Against the advice of my friend, Marisa, I did small runs and rides the rest of the week. I felt bad during and after each one. I was (and still am) worried about thyroid, anemia, etc...
Then on Friday, things changed a bit for the better. I did a three miler in the a.m. I didn't do it fast, but it felt automatic. That is, I felt as though I could go more and more.
Saturday arrived and I decided to hit the trail at the river. Intellectually, it seemed to be pushing things, but physically I felt fine. I knocked out the loop with no problem. I took it easy the rest of the day.
Today I awoke and hit the trails again. I was doing a pace faster than I have done in months. I passed a group of three runners who had started ten minutes ahead of me. I then passed a guy who was running at the pace I normally do when I'm doing the trails. I ended doing the full loop in about 8 and low change per mile - faster than I normally train.
When I completed the run, I felt so good that I pulled my bike from the back f my Element, put on a helmet, clips, and shorts, and took off to do another circuit on the velo.
I'm keeping my doctor's appointment for the week. I want to know what was/is wrong. But I do feel as though I've emerged from a dark place with a bit more strength.