This could be a long thread, my friend, so why not become a member and settle in with us? Just click to join. Painless, I promise, plus you can do private messages that way.
I know that pain, yes, I know that pain, and I STILL get it every now and then, plus that dull toothache thing AJD mentioned. Of course, it should be checked (including the stress test) to rule out the usual suspects. Meanwhile, I'll tell you what I THINK I THINK, based on personal experience.
Muscle pain. Yep.