I wonder if this is because of the steroids. I did end up taking them for around 2 weeks straight while out of town. Maybe this is simply the price of going off of them. My body could easily have started producing less endogenous steroids as a compensatory response. Then when I go off the pills upon returning, it's shit city. You'd think that it would take longer than 2 weeks though.
Whatever the cause, I'm really not a happy camper right around now. It's even worse knowing that if I simply popped another steroid or two, I could probably buy myself some relief for a day. Feh.