Insomniac for 35 years

I have been an Insomniac for decades. I sleep about 2 hours and wake up as often. I have not had a full nights sleep in all that time. I tried a prescription sleep medication and ended up in "sleep paralyzation" where I couldn't wake up. That was really frightening.
I have a Sensory Hypersensitivity issue as well. Basically my hearing, eye sight/sensitivity to light/ flashing lights etc./ touch/ odors - those things are like "Superman" and this is no fun. I can't shut any of it out and it all comes in so fast.
I use a fan for white noise at night, keep the room as cold and dark as I can (I am also a Migraineur). I have a soft mattress, not soft enough, it feels like concrete to me. My husband passed away 20 months ago (pancreatic cancer), before that he used to rub my forehead gently and my neck until I fell asleep and I could get 4 hours sleep at one time then the every 2 hour wake up would start.
Has anyone had success with getting at least 2 -four hour sections of sleep at night?
Kasey7