Geez Jed you are having all the fun! I don't have an answer for you. I think it would be really challenging to know what is any one thing individually and what is possibly a combo of things. I suppose on the meds you may notice a pattern of timing and certainly the MS nervy symptoms will stand out. But fatigue could be any number of things. The chronic tedium of being ill and dealing with the loss from that can wear you out too!
I am glad that you are here. There is wonderful support on the forums. Come when you need to vent, ask questions or with good and bad news. Be kind to yourself.
I am sending Healing Love,
Littlepaw