anyone else out there frustrated with their weight loss?

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HI!! I was hoping to find other people who have a hard time losing weight. This is my 10th "diet" in about 5 years, and nothing is working. i have lost 6 pounds so far, but that was in the first 2 weeks......i am on week 8!! I don't understand WHY my body won't allow me to lose weight. I get to a "set point" and then.......NOTHING!!!! grrrrr!!! i am eating ~1200 calories a day and doing 45 mins cardio 3-5 days a week.

any suggestions???