I don't know a whole lot either, but I'm sure that this fever thing is significant. Have you had a recent blood test for inflammation? You say that's not your problem, but it can come on suddenly. I'm also wondering whether you've checked all your meds with a pharmacist for interactions, especially if more than 1 doc is prescribing. Some of those interactions are psych & phys both, & some (also side effects) affect immune system. Fever can also be drug-induced (or so I've been told).

Cervical component? Chemotherapy/radiation?

You are really caught in a vicious circle here. Would it help any if you went in to work with the mindset "I'm just here for half an hour"? If that works stay 30 minutes more? One of the tricks I play on myself....

Your headaches sound familiar. Do your temples ever feel hard to the touch? I have a head band for runners that has a gel in it, I put it in the freezer & it stays cold/cool for a hour--keep a spare in the fridge at work (that's a prob, I think, for you). Also use heat patches on my neck & shoulders. Doesn't get rid of it but usually lets me live with it. Yoga helps too. 20 mins workouts am & pm + stretches thru-out the day. Cardio-type exercise makes the headaches worse by raising BP, but yoga lowers it.

Wow said I didn't know much & just keep on proving it! Stabs in the dark. Well you know you can't keep calling in. Sure hope your md-doc will experience a eureka moment & come up with a real solution for you this evening.

((((((((HUGS)))))))) & all best vibes going out to you, ~ waves~ !