Diet pills...

MJJS
Hi girls! Ok, so I know taking diet pills is NOT the best way to lose weight, but I have about 40 lbs to lose before October. I wanted to get something to help jump start my weight loss and get me motivated to go to the gym... Any one use or have used any without the annoying side effects of not sleeping? I'm a light sleeper to begin with, and the pill I used 4 years ago to help me out is discontinued. Thanks!