I NEED ADVICE AND HELP

Listen to your body! I find the MFP calorie recommendations to be a bit low (and so have my friends, and a personal trainer or two!) Not sure how long you've been doing this or what your calorie goals are, but, I was doing 1200 calories and working out - not losing and feeling like crap - cold and exhausted every night. So, I would tell you to do some research and find out what you can adjust...maybe you just took on too much too fast, but if you're feeling wiped out, your body is telling you to give it a break

Are you drinking enough water and getting enough sleep? That affects how tired you feel a lot more than the food does, assuming you're eating enough calories to begin with.

If you're set to lose 1lb a week, MFP has set your calories to be 500 less than you need per day. If you go over your target by a little, you shouldn't gain weight, but you won't lose as quickly.

Well, in a nutshell, if the calories you consume are more than the calories your body will burn in, say, a 24 hour period, you will gain some weight.
Keep an eye on that calorie counter on your home page and log everything so you'll always know where you are calorically.

So you're leaving your body to survive on body fat only after you take your exercise off your calories, plus it's not sustainable so when you have had enough you have a binge day. Would be much better to eat more every day and lose the binge days.

Women shouldn't eat less than 1500 calories per day, if you're only eating 800 calories and burning 1000 calories, you in effect don't have enough energy (food) coming into your body for it to function, so it is shutting down, which is why you are tired and feel icky. You really need to eat more and eat at least 1/2 of your exercise calories back. Try it, you will feel 100% better and have more energy.

Hello - I'm a little concerned regarding the amount of calories you're consuming and the amount of exercising you're doing. It is not healthy. On top of that you exercised for over 9 hours on Saturday! Please be careful. It is good to be healthy, but this seems obsessive.

To follow Myfitnesspal as it is intended, you should be aiming for the number on your homepage (not on your diary page) to say 0 calories remaining, or as close to that as possible. You should not be aiming for this to be a negative number. You don't need to burn more calories than you eat through additional exercise. You already burn most of your calories through normal everyday activities and just being alive.

When you set up with Myfitnesspal, it gave you a calorie goal with a deficit already built into it. That means you could lose weight through meeting that calorie goal and not doing any extra exercise at all. It's no wonder you are exhausted - you're not getting anywhere near enough calories to fuel that exercise you're doing.

On your diary page, the number of calories it says you have remaining is the number of calories you can eat and still have the built-in deficit calculated by MFP. Some people choose not to eat all those calories, and make their deficit bigger. Your calorie deficit is quite extreme though, and from the sounds of it, your body would really appreciate the extra calories, or you're going to burn out.

lots of times I eat below 1200 cals I am just not hungry on other days when I am hungry I go a little over. But if you are feeling exhausted I would make sure you are getting the proper nutrients, Take a multivitamin for woman and also add some protein powder into your diet this will help.

You're exhausted because you are probably overtraining and are definitely undereating.