Erm, could it be that you're working full time & going to school full time?

Really. People don't do this every day. I know you're your own martyr but seriously. You're getting an MRI?

I'm sorry, I just have to bring it up. Jesus. You're doing a masters and working full time (and are apparently the most important person at your job).

Maybe it's burnout?

You're spending how much on medical tests?