Yes, night time anxiety for different reasons. Would it help to just get up and walk around slowly a bit, get a drink of water? I know how it feels to try to "relax" and just feel worse...it can just increase panic or tension. I find it helpful to just get up for a bit, sit in a chair with the lamp on, move my feet a bit, maybe read something light and short.
I'm not sleeping well tonight...woke up quite wired at 3:30am and was NOT going to get back to sleep any time soon. I got up for a bit. Now I'm laying on a heating pad since lower back is tensed up. This will at least help me relax a little, even if I don't sleep...maybe I can get a little nap in later. I take sleeping pills and muscle relaxants as needed, but sometimes they don't even work very well. Hope you get some rest sometime.