Boosting Metabolism to Jumpstart Weightloss

Hello, this is my second post up on the message board, I could really use some advice from some myfitnesspal veterans.

All my life (up until recently) I have been quite fit due to my competitive swimming schedule. I am 5'0'' and used to be 100-110 lbs. However, after I started college, I had to quit competitive swimming to focus more on school. After that, the weight just piled on. I am now a whopping 133lbs and I feel horrible, I am stressed and I feel so bloated all the time. Last November I got my weight down to 120lbs (wasn't hard with a good metabolism, took about 3 weeks) but over the holidays I gained back everything I had lost and now I am stuck at the beginning again. Summer is coming up and I just won't let myself go like this.

I started regularly dieting and exercising again but I have not lost any weight. Is there anything I can do to jumpstart my weight loss, increase my metabolism, and get down to 105-110lbs? A detox program perhaps? A specific diet? I was looking at some green tea extracts and different CLA formulas (and sadly some other diet pills) but all these supplements do not have any clinical backing.

PLEASE HELP!