I mean, if you can't keep your eyes open it sounds like the naps are very necessary... Energy management is real and so damn tough. Writing is lovely but also demanding.

If not knowing whether to rewrite past scenes or not is blocking you from continuing, it sounds like maybe it would be worth going back and making those changes that worry you. Maybe for the smaller ones you can just add a few brackets like [setting change, add mountain view here] or whatever, and a little bit more for the scenes that have a larger impact but not necessarily rewriting all of them fully either...?

Good luck figuring out a path forward, and with your April & beyond goals!