Yeah, it sounds like your body is well into recovery but your brain still needs rest. Isolating myself in a quiet, dark room worked pretty well for me. I just slept whenever I could, day or night. Some things that helped during awake time were doing guided relaxations (I found lots of free podcasts for this), listening to nature sounds like falling rain or lapping waves, and practicing mindful breathing.

I felt much better after about a week of this. Can you take a little vacation?