Thanks, everyone for the advice. After 4 days of doing the stretches, my groin is almost completely better. I was up doing yoga at 4 AM yesterday!
The knees and calves are better, too. I am going to go x country skiing after work today, since it looks like we are getting a big rainstorm Friday and that might be the last of the snow. I will be taking it very easy on a local trail, with no big climbs.
I thought I might be on my bike this coming weekend, but not sure how that looks now.
Robyn