I have this small, hard white thing sticking out of the end of my c-section insicion...any ideas what this is?

I delivered my 2nd son via c-section 4weeks ago (5/5/08) and the doctor used glue to close the incision. My older son was also delivered by c-section but I had stapels with that one so this is a little different. I've noticed as the area heals this small, hard white thing is barely sticking out thru a very tiny hole at the end of the incision site. The very small area also bleeds a (very) little after I shower or if my underwear rub the area . The whole area from the incision up to just under my belly on still pretty sore and very tender to the touch. Just wondering if anyone has any idea what this white thing is. Common sense tells me to call the dr but I have a followup appt Friday and don't want to have to go all the way there earlier if it's not needed. Also, I have a very low pain tolerance so is the pain I'm still experiencing in my entire lower abdomen normal? I don't remember any of this with my last c-section. Any advice is appreciated.