I had a similar experience some years ago. I had been developing a jogging habit (didn't cycle much at that point). Woke up one morning and my ankle hurt, mostly to walk on (like a sprain) - but I hadn't done anything. Figured I'd slept wrong and it would go away so I didn't do any jogging or biking for three days.
It didn't go away. My PT sister advised ice and taping it. I ended up taped for about 5 months - it wouldn't hurt, but then I'd try to jog and get about 100 yards before it started complaining - not shrieking, but definitely MESSED UP.
Eventually it *did* go away. And cycling isn't jogging so maybe I could have done that. I wasn't addicted yet :-)