Have you ever been able to take a sleep aid that worked for you? I'm lucky (sort of) enough to be very med sensitive so all I have to do is take some Benadryl and I'm out for at least a couple of hours. That's what i did during my last manic episode. I suppose a teensy bit of sleep is better than no sleep at all. Even if Benadryl doesn't work, do you have a pdoc? Can they prescribe something?

Otherwise it's just going to get worse.

I don't know if relaxation techniques would work but there's a lot of guided meditation on YouTube that helped me sleep last summer - though I was missing sleep from anxiety, not mania. When I was manic nothing but drugs would help.

I hope you find something soon!!!