Sounds like you're on the mend, Ickie. When they give you that dope in the hospital to numb you up for operations, it leads to all sort of interesting feelings once you're on the mend. It takes a while to get it out of your system and it's going to cause aches and pains while it's being flushed. That caffeine causes your blood vessels to dilate, I think, so maybe that's to help increase blood flow for you a little. It's also a diuretic.
Everything's like you left it here, we've been waiting for you to get back and, as has been said, nothing's been broken in the interim. Best wishes for a speedy recovery!