Gained 2lbs in 2 days?

Can be a number of things~ water retention, good old Aunty Flo coming to town....but I agree with everyone else you are definitely not eating enough. You may think it's working right now but in the long run; you are messing with your metabolism and that's just not healthy. Eating that low of calories is most likely going to make you feel tired, sluggish, headaches, etc.

Go and eat something! You didn't gain weight overnight; you certainly won't be taking it off overnight. It's a permanent journey that you have to stick with and BE PATIENT!

While everyone else is saying exactly what I'm thinking - if you don't want to hear about eating too little - here is the next option. I too weigh daily but only log my Monday numbers. Doing this for months has shown me one thing - in the several days (5 to 7) before TOM - my weight will shoot up nearly five lbs - and as soon as I start - it falls right back off - so it could be as simple as water weight/bloat. But again - the above (and what the majority of the others have posted) really nails it.

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Thank you for the replies, although I may not want to hear it - I understand I should be eating at least the 1200 calories that MFP recommends. It's the fear of gaining any weight/not losing it quick enough that stops me from eating up to that 1200, silly, I know! But I'm under a lot of pressure at the minute to lose weight + stress of exams and feel like my appetite has literally disappeared. I will however take the advice you've all given, try and ignore the small weight fluctuations/stop weighing myself everyday and try and eat more.

You really need to rearrange your thinking...weight loss and the words quick, quickly, fast, etc do not make good bed fellows. Safe an healthy weight loss is 1/2 - 2 Lb per week depending on how much you have to lose. The less you have to lose, the slower it should be.

Also understanding that you should be NETTING to at least 1200...and for most people that's really still too low. This means when you exercise you should be eating exercise calories back...my rule was always at least 50% and up to 75% to account for estimation error. You need to understand that calorie goal already has a HUGE deficit from maintenance built in. Netting below that goal is really unhealthy...health is far more important than quick losses. Also, fast weight loss is largely water loss, not fat...and muscle as well...but not a whole lot of fat.

Best of luck RavenMoon, it is worth upping your calories as, when you do reach your ideal weight, it will give your body less of a shock when going back to a normal daily rate. Maybe try getting up to 1400 over a period of weeks and seeing how you get on? I have been losing slowly at 1 pound a week. I log my fluctuating weight in my food diary every day but only "publish" to MFP when I see a movement downwards. Sometimes that takes a few weeks or longer but I get there eventually. In the meantime, I am losing inches with consistent weight training...