McKenna Asked: Should I take sleeping pills? if so what is best?

I have a mild sleep disorder and the doctor suggested surgery. I have a heart problem and have to be declined from Valley Medical so i can go to Childrens' hospital so my mom's insurance can cover it. The process is long and I'm so tired everyday, kinda falling asleep in class. I can't wait to long. The surgery would take my tonsils and adenoids out. Which sleep pill would be best with some with a heart problem?