Vaginal tightening?

Ok so I have this thing where I get tighter the more i orgasm. but it doesn't really loosen up when the orgasm or even the sex is done. It takes a good couple days without sex to go back to normal. This is all well and fine but after the tenth or so ( yes my lover foes this to me quite often. The bastard has stamina from hell) but I end up really sore because of how tight i get. It feels like my vag is rubbed raw disputed all the lube. Does anyone else have this problem? Can we discuss?