You said your Tinnitus is one day on and one day off. I have low frequency Tinnitus as well as high. My low T fluctuates although the high is constant. Consider yourself lucky you have days off.
The pillow is important, but it must fit your sleeping position, too (side or back sleeping). I have separate pillows for this (more height for side pillow). And when I sleep on my back, I occasionally use a neck role.
The SpineAlign pillow allows you to take out/adjust the amount of fill and has separate areas for back/side sleeping. However, it is ridiculously priced. I do not have it
Also, when sleeping on your back, your spine rounds a bit since it sinks into the bed (the softer, the more it sinks). I occasionally put a towel/small blanket to prevent this and keep my shoulders open. This is hard to adjust though, and it takes time to get used to
I'll leave you with this question before I go though. Do you think sleeping for 2-3-4 hours on my back without moving much could be an issue? I always fall asleep on a spike mat and I imagine I stay quite still on it of I don't wake up for several hours on the mat. If I moved I think the spikes would wake me up, and they inevitably do. I know the body moves around a lot normally when sleeping
Sounds good. Also, taking walks with a good walking posture is very helpful (to correcting posture) as well. I will explain this more another day. Make sure you swing your arms, and don't hold tension in your shoulders or neck. Walk relaxed, but upright in good posture (ears in line with shoulders). Arms should swing straight. The arm swinging is very important.
It shouldn't be an issue as your body will move if it needs to. Yes, moving around happens quite a bit while sleeping. It is the only reason I am considering that expensive SpineAlign pillow (or I might try to make something similar). If I sleep on my side (with higher pillow) and roll to my back, I get issues because of the positioning of my neck and back.