Thanks for query,
Pelvic muscle exercise helps some what.Just hold your pelvic muscle like that (you have a urge to urinate but you are holding it) for some time & then relax it.This should be done at least 20 times in morning & evening.
You have undergone normal delivery or you have a ceserean.?If normal delivery then you may have lost some of it's elasticity due to over stretching leads to loose vaginal vault
If it is due to delivery then you require anterior & posterior wall repair.
Vaginal fluid discharge during intercourse is normal phenomenon we cannot decrease it.