Sleep deprived for years

I'm older I took a medication for a long time. And it really messed me up. Because for years now I only get 3-4-5hrs of sleep. Everyday. No matter what. I never ever sleep during the day. But my brain feels weird also like it's never sleep I don't know how to explain it it's just a fog. So e days I'll wake up after 2 hrs of sleep then when trying to get back it's impossible I feel reved up and just can't relax. I tried Ambien I tried melatonin I tried pretty much everything and they have no effect. I'm starting to really struggle.. because I don't have the time for a sleep study or I'm terrified of what there going to find out because I do think I'm permanently screwed up.