snowbunny3318: Have you developed bad sleeping habits previously? It took me a full year to readjust my circadian rhythms after seminary. If that’s the case, then I don’t think fancy drugs and etc. will help. I sort of just braved through it (with some abuse of caffeine pills and cold meds :P).
My advice: Don’t try and force yourself to sleep at prescribed times. If you are really having trouble, you are going to have to ease yourself into it. Take naps during the day if it helps, and try to slowly get yourself into a normal schedule.