Put on a huge amount of weight in a few days. Panic

I don't think you gained 10 lbs of fat. You may have gained a little, but I bet most of it is water weight caused by retention and stress and maybe sodium. To gain 10 lbs of fat, you'd have to eat an extra 35,000 calories. It sounds like you ate really healthy food the whole time - wow! That's a hard thing to do on vacation!

Also, are you using the same scale that you normally use?

Go take a dump. Bet the numbers come down then

Your hard work won't be undone. Drink lots and lots of water to clear your system, probably to much sodium as said here before.
I never weigh on holidays nor eat healthy good job!

Where did the OP say she weighed herself at night? She said she just weighed herself - i.e. this morning.

I agree that it is pretty unlikely you have put that much fat on that quickly. Wait a few days and see what happens.

Go take a dump. Bet the numbers come down then

Keep an eye on your bowel movements and your sodium intake. It's probably travel-stress induced. Drink a lot more water!

I echo all that everyone has said so far, plus a bit of my own personal experience for comfort.

I went on holiday in September this year at 10 stone 2 (142lb). I came back, one week later, at 11 stone 3 (157lb). And that was with me going to the hotel gym every day too.

It happens - when I relax my diet some, my body relaxes too. If I have a lot of salty food, the sodium bloat is loud and proud. It's not fat - just your body reacting to different foods.

A lot of water and week of exercise later - back to 142lb. It happens, please don't panic.

Weight that goes on that fast also tends to come off fast as realistically it would be impossible to add 10lbs of fat in such a short time.
My holiday week in September saw me gain 7lbs despite daily gym sessions and loads of walking and swimming. Took about 10 days to lose it again.
If seeing the numbers upsets you so much put the scales away for a week and just keep on doing the right things.

We travel a lot and while most vacations, I work out and eat right, there have been a few trips that I've come home literally busting out of my clothes. Like over 2 weeks in Australia with a group of people. Not one day of exercise and lots of good food had me pretty miserable once back in the US.

10 lbs is not that bad. Most of that weight (if it were me) would be bloating due to the severe change in diet. Drink lots of water and eat really clean for the next few days. Lots of veggies and fruit. Work out, when I come home from vacation I'll normally commit 2 hours a day to working out for 3 days just to get those vacation pounds off.

One word to the wise ... on a trip to Chicago, I ate all this rich food for breakfast, lunch, and dinner. Just really went off the wagon for 5 or 6 days. (I've maintained a normal weight now for 15 years and am a healthy eater who eats a plant based diet with some meat and carbs) When I got home, I had to be hospitalized for 5 days because the change in diet was too much for my body to handle and I had an intestinal blockage. It really made me think about splurging on vacation. I need to be more careful and I'll never eat deep dish pizza 4 days in a row!!!

I had a similar thing not so long ago, I had a week 'off', didn't eat atrociously but gained 7lb in a week. I went straight back on it after my holiday, ate as normal and drank loads of water and lost 8lb in 7 days.

It will more than likely be water retention. Give it a week. get back on it and don't stress yourself.

I did cry. It is so depressing. I hope some of it at least is salt. It's just so crap that 4 days could undo 2 months worth of dieting.

this isn't possible. take a chill pill.

Yeah, no worries it will FLY off and mostly water. I remember going on a cruise and gained 22lbs in a week lol... At least 10 of them was fat but 12 fell off in a week no problem lol

The scale is a filthy lying W (rhymes with door)
Sodium, etc was high.

Continue as normal and it will drop off
This is the reason I never even weigh in for 2 or 3 days after a vacation.

Where did the OP say she weighed herself at night? She said she just weighed herself - i.e. this morning.

I agree that it is pretty unlikely you have put that much fat on that quickly. Wait a few days and see what happens.

"Just weighed myself" - timestamp 12:20 am.

I was wondering if I was eating enough calories before but I was still loosing weight so didn't worry about it too much.

Can you or someone explain what glucose stores are to me?

Do you really want to only lose weight, no matter what it is?
Or do you want to only lose fat?
You can end up skinny fat as many do, thin muffin top squeezing out of pants whenever you bend, then arms flapping in the breeze, ect.

Eat too little for your level of activity, have the wrong exercise, and not eat enough protein, and you'll lose muscle mass, lowering your metabolism, and under-eating also lowers metabolism more than even that would cause. Bad combo for being able to continue losing well or go into maintenance later.

Just because you can pound a finish nail in with a sledgehammer doesn't mean it's the best way to do it.

Glucose stores are limited, around 400-450 calories worth in your liver, keeps the blood sugar where your body wants it, always topped off after a meal with any carbs in it, if not, excess amino acids converted to it. If none, muscle is broken down to convert to it.
Stores in your muscles range from 500-2000 depending on your exercise type and how fit you are and how much muscle you got. 1 gram of glucose stores with 2.7 g of water, meaning 500 cal worth weighs 1 lb. Those stores are only usable by the muscle they are in, can't be put in the bloodstream for use elsewhere. Once gone, liver stores used by the muscle. If that's too low, get ready for muscle breakdown to convert for usage. (fat is used as energy this entire time too, low intensity about 50% fat, high intensity can be none).

That's weight that increases your metabolism too, so desired weight. Besides fluctuating weight.

But if one decent unusual day of carbs of 500 excess of what is needed, and you weight goes up 1 lb, your stores were low already. Bad state to be in, missing out on extra Lean Body Mass that increases metabolism. Plus needed energy stores.