Sleeping issues

I've had sleeping issues all my life baically.. I've tried some medicine my doctor gave me(and it made me hallucinate and forget stuff tbh) so I stopped that. Tried just melatonin and it works for a few days then it won't for a few days. Tried benadryl and it works like the melatonin. I've tried taking melatonin one day then benadryl the next off and on but nothing seems to help. Anybody have any suggestions on what I should do? Or what they do with sleeping issues. I'm going to the doctors on the 7th so if I don't get any responses here I'll ask for a different medication. Thanks in advanced. :)