piriformis?

I'm beginning to think that's what my butt, hip, back, thigh (and now groin) pain is. I can feel this ache deep in my "gluts" (don't snicker!) that feels like it's where my femur meets my hip. I know I'm under the effects of taper madness, but this is getting kind of disturbing. It seems to be causing all sorts of other problems and while it certainly won't result in a DNS, I'm worried about it holding up for 26.2. Of course, I say there's a 50-50 chance I don't feel it at all Saturday.