Is it water weight?

Yes, it's normal to weigh more later in the day. Not only is it water weight, but also the weight of all the food and waste added to your system as the day progresses. That's why it's recommended you weigh yourself first thing in the morning after you visit the restroom. Weighing yourself several times a day is just asking to be discouraged.

I'm a big proponent of eating more than 1200 calories, or at least logging your exercise and eating back some of your earned calories. You'll have to play around and see what works for you.

1. If you are on 1200 calories per day you don't really additionally need to make that low carb. On that low amount of calories to then deny your body of fuel it needs isn't going to get you anywhere. You need to eat healthy carbs e.g. wholewheat pasta, brown rice, sweet potatoes, etc.
2. Don't weigh yourself after every meal, it's ridiculous and is going to send you on a downwards spiral. Weigh yourself once a day (if you have to) and make it in the morning, after you go to the toilet and before you eat anything.
3. People gain anywhere between 1-5lbs in the course of a day due to water intake, food, etc. and then the following morning it is gone again where the body has digested this.
4. If you are working out, you could be gaining muscle. Muscle weighs more than fat but makes your body look a load better.
5. You haven't even been working out for one week so I don't think you need to be adding anymore exercise in just yet, you could be overdoing it a little if you are new to working out.
6. If you are going to eat 1200 calories a day you MUST hit that bare minimum. And if you are subtracting your exercise calories from it, you must then eat them back. 1200 calories is the minimum amount of calories per day your body needs to function correctly, so if you go under your body will hit starvation mode and you wont lose weight because it will store up all your fat.

My advice is to measure yourself and go by measurements whilst you are using the 30 Day Shred, weigh yourself once a week i you have to but don't take the weight seriously and instead go by inches for your progress.

I can easily gain 10 lbs in a day based on food. You get pasted it by stop weighing yourself throughout the day and probably better to do it once a week. Also, you should probably feed yourself more. With 25 lbs to lose, you should probably aim for 1 lb per week and at least eating another 200 calories on exercise day or just setting your account to lightly active.

Whoa whoa whoa! Stop weighing yourself so darn much!! You've only been at this for 5 days and have lost weight! This is good. Take deep cleansing breaths... There now - feel better? :flowerforyou:

You only gained 2 pounds of water weight (145-147) from the Chinese food. The other three pounds is the weight of the food you ate for lunch plus anything you may have had to drink. We don't think much about our liquid intake but look at it this way - 1 gallon of water weighs about 8 pounds! So a cup of water weighs about 1/2 pound. Add that to whatever might be in your colon and/or bladder and you've got another pound or two.

And I agree with psulemon (of course, he's pretty freakin smart) about your weight loss goal. Make sure it's no more than 1 pound per week. And make sure you eat back your exercise calories.

Hide the scale for a few days, it may do you some good.

How many cups of water do you consume? There are some days that I drink upwards to 12 cups of water... which can weigh over 6lbs. Add food on top of that... and it'll explain the weight 'gain'. Weigh yourself once a week, preferably in the morning before eating, and after using the bathroom. This will give you a more accurate answer.