I have the same symptoms, so tom. will ring the midwife as the doc said it was cos I had a c-section and baby's head would bob down there - what crap!

Its like a stabbing sensation in the groin. When I get up off the couch or sometimes when Im going for a pee in the middle of the night it happens. They said you should avoid stairs as well, that explains why it happens when Im getting out of the pool!