Working out almost every day but gaining weight

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Honestly, without really tracking, you can't know what the culprit is, you can only guess.

Some steps you can take to start getting accurate data that can point you at real, accurate, answers about what's going on for you:

Take measurements periodically: waist, hips, arms, etc.
Take pictures: even if you don't show them to another person, comparing pics of today to three months ago can often be as significant an indication of change as the number on the scale.
Begin measuring your food and accurately logging it. Measure it with a scale (by weight) instead of with a measuring cup or spoon (by volume) unless it's liquid. (Seriously, it makes a difference).

Don't just shoot for keeping your calories under a certain amount (though do that as well) ... also watch your macros (carbs, fats, proteins) and make sure you're getting a good mix, you need some of each, and make a conscious effort to err on the side of more protein whenever possible.

1. You're probably eating more than you think. Be sure to weigh solids and measure liquids. Log everything because there is no such thing as a "free" or "negative" food.

2. You're probably not burning as much as you think. MFP and gyms usually overestimate how much was burned. So if you "eat back your exercise calories" you're probably eating back more than you actually burned. And if you're only estimating how much you're eating then you're eating back a lot more than you burned. If you aren't sure how much was burned or don't own a food scale, I usually recommend eating back up to half of those exercise calories to be on the safe side.

3. "Enjoying yourself on weekends" is a bad idea. Not that you can't eat/drink what you like, but having 1-2 (or 3 if your weekend starts on Friday evening) binge days can easily throw off your weight loss efforts from the rest of the week. I recommend staying under your goal every day. If you go over by a little on one day, make up for it by eating less the next day. Keep your diet at something sustainable: 80% healthy foods (carbs, proteins, fats) and 20% indulgent (foods that are high in sugar or sodium) but eat smaller portions so you consistently stay under your calorie goal, because staying under your calorie goal is the only way to lose weight.

4. If your weight loss gets stalled for a couple of weeks, that is a normal part of weight loss. If you stay at the same weight for more than a few weeks, chances are you're at maintenance meaning you're no longer eating at a deficit and need to adjust your calorie intake accordingly.

WEIGHT DOES NOT EQUAL FAT.
Measure your body before loosing weight. Your body likes to retain water but no way have you consumed over 20000 calories for it to be fat. It's probably water weigh, decrease your carbs to like 120g or stop working out so much. With all the workouts you should be drinking a good 3L of water a day and 3g of sodium. What are your macros?

Mmmmm.....perhaps she is consuming over 20,000 calories. Her diary is not open, so we would not know that.

Isn't it amazing how much random information is popping up. Seems like more than the usual lately.

Yep.

It very likely could be the eating habits causing this.... I know my eating isn't perfect but I just thought that with this much exercise I should at least maintaining and not gaining.

Typical day for me is bananna and yogurt for breakfast,
Then lunch Is often a turkey and tomato sandwich on wheat with an apple, cheese string and maybe banana
Then dinner is something like homemade pizza, or chicken stir fry, or BBQ chicken and pasta salad or whole wheat pasta with chicken. And sometimes frozen yogurt for dessert.

Then on the weekends we usually go out to eat at least once and te usually not the best.. Something like pizza or typical restaurant food and a couple beer.

But even so on most days my calorie intake is never more than 1900.

1900 calories is way too much for someone your size. Try to stick to 1400-1500 calories a day.

I'm almost 60 years old, 5'1" and 104 pounds. I could never eat 1900 calories without gaining weight. My intake is more like 1350-1400 to maintain with moderate exercise. And if I didn't track it, my eating would gradually creep up. It is very easy to eat an extra couple of hundred calories without realizing it.

I agree you should be tracking your calories better, but I would guess the 5 pounds is probably water retention.