BIW, I have experienced something similar. Many years ago, I was doing press ups when I felt a sort of pop in my right bicep. It's never pained me, but I have lost some flexibility in the arm. I can no longer bend my right arm behind my back to touch my left hand over my shoulder. I can with my other arm, but can get nowhere near with my right arm.
Red, I'm hoping that your next hospital visit will be Try to stay positive and we will be supporting you on here. The Hygienist's charge is high, but I do get a full 30 minutes. By way of comparison, my visit to the Dentist the day before was £44, for about 5 minutes, which including him discussing his recent hip operation which he blamed on road running and rugby in his early days. Well done on your tempo run.
Ran 6.25 miles this morning at a very relaxed pace, and got back home before the heaviest of the rain came. No snow here yet, but may be some overnight. My barometer has fallen from 1020 to 979 millibars.
Exhausted, take care running in dangerous conditions.
Last night's question and answer session was very interesting and informative. It was very noticeable, however, that it was mainly the older club members that attended.
Will be going for a steady run later this morning, and then taking Friday and Saturday as rest days. I'm hoping that the bitter winds forecast for the weekend won't spoil our little trip over to the IoW on Sunday.