I gained 40 pounds on zyprexa, lost 15, gained all 15 back plus 5 more.

I am no longer on zyprexa, but I think both the risperdal and zoloft I am on can cause weight gain. I weigh 149 lbs and I am 5'3''. I want to lose 40-50 lbs to get back to where I was before zyprexa, but it is hard.
I'm not happy with my body. I am not supposed to be overweight. This is just not who I am. I have little to no control around food-if I taste something good, I will wolf it down and keep eating it until I am stuffed. It's disgusting. My arms are huge. There is honestly a sweater dress I used to wear that no longer fits solely because the sleeves are too tight, lol.
But I'm going to lose the weight. I've been on a diet since last Saturday, and I have a feeling that this is going to be the time I legitimately lose the weight!