Trying not to get upset...

Hey everyone! I just need a moment to vent about what's going on for me with myfitness pal...

I've been using MFP for 2 weeks now, and at first I was loving it. I had been using WeightWatchers with no results for months, and felt like I was hitting a wall. I decided to try out MFP, and felt like it was more up my alley. Here's a little more about my history:

I've had weight problems my whole life, but dropped 40 pounds in high school thanks to the South Beach Diet. I eventually dropped down to about 124lbs, but gained 20 of pounds in college. Again, dropped down steadily to around 122lbs, but went back up to 128 post-college. Last summer I gained 3lbs during a vacation (no big deal, I know), but couldn't drop the weight once I got home. Then about 3 months ago I gained 8 pounds seemingly overnight (really, it was about 2.5 weeks). The only change in my routine had been starting bikram yoga 3 days a week. The weight gain stopped, but now I've gained another 2 pounds this week alone.

I'm incredibly frustrated. I know for sure that I don't eat enough calories to gain this much weight in such a short period of time. My job requires me stand/walk for 8 hours a day, I'm still practicing bikram yoga 3 days a week as well. I had my thyroid checked out about 2 months ago, and my doctor said everything was normal. I may not have the best diet nutrition-wise (I'm a poor artist living in NYC), but I feel like it can't have caused such a massive weight gain. It just all seems unstoppable, and I feel like there's nothing I can do but sit back and continue to blow up. Sorry for the whining, but I'm at my wits' end.