Holy crap, that sounds terrible. I'm sorry to hear that. I got Pneumonia once after spending 10 weeks in Costa Rica. It was so bad, right before the flight back I tried to clear my ear-drums a bit and ruptured an ear drum. That flight was hell. It was not fun at all.

I'm totally fine compared to that. It's just a minor sinus headache. So sorry to hear they've been misdiagnosing you. I hope you get the rest you need for a full and quick recovery.