Pain in my Butt

So, basically since I wrote that awfully bold post about all the aches and pains I'm not feeling, I have been feeling lots of aches and pains... particularly in my rear end. Today I can't even sit on it flat - the tail bone is completely unforgiving. If I teeter off to one side or another, I'm okay. If I sit way forward, I'm okay. But just plain old sitting is not an option. That, and every once in a while I can't walk on my legs cause my butt is spasming all weird-like. The pain in my butt is a pain in the butt.