I do find myself needing at least one nap, but I don't always get to. I try to listen to my body and rest or nap when needed. I find it helps to have a nap, but sometimes it also hinders the rest of the day's activities by not wanting to do much after a nap. Most of the time it does help though.

I slow down as the day goes on out of exertion pain. I plan things that require more energy earlier then pace myself and end the day with less energy demanding activities as the day wans.

From what I heard. Due to high pain, the body works extra to compensate and respond.

I get fatigued fast.

I have found doing a Non Sleep Deep Rest or "Yoga nidra" session from YouTube helps with the afternoon fatigue so I can get through my evening. All you have to do is lay down, get comfy, put on ear phones and listen and relax.

Yes sleeping and bathroom are stressful as is non stop pain!
Happy u have found someone to listen and try to help
Magnesium is helpful but tricly it can also upset tummy.
You have to find a comfortable dose