Really trying to lose weight. Help?

Ever since me and my boyfriend broke up, I have been feeling less confident mostly because I had gained about 15-20 pounds when i was with him. I finally lost the extra weight I gained when i was with him but i still don't feel very confident. I'm not necessarily over weight any more but I haven't exactly had a lean body

Anyways, I walk for about 20 mins, run 20 mins, pilates type exercises (mostly cause I'm in a dorm) for about 30 mins every day. I do switch up the exercises (ie. abs one day, legs next, then arms, etc) and i do all this every morning (not including the walking to classes and such). I also eat 1,000-1,200 calories a day and not of junk.

Unfortunately I've hit a plateau though. I will be starting p90x in a week or two. Any advice for me to add to my daily regimen? or just tips in general would be appreciated.

Thanks to all!
Really trying to lose weight. Help?
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