Slightly TMI. I've always had heavy periods, and pain in back/down thighs with them
Javelin bum pain - also diarrhoea/upset tummy before period
Recently I've noticed I will need the loo, and I can't go because the pain of having a bowel movement is like javelin bum pain. When I go, the pain stops
Conceiving - first time, not even while technically fertile period and he withdrew 
Any ideas?
I'm at the GP in a week for a knee problem and wondering whether to mention it. I mean being in so much pain having a poo can't be right!