What Causes Swollen And Painful Vagina?

for a while now ive been suffering after having sex with my husband!! About 9-15hours after sex i am extremly uncomfortable below and it feels like my in vaginal walls have swollen together!!! This makes me feel like i need the toilet constantly as if desparate for a pee but im not! The only thing that helps is a long long soak in the bath before i feel noral again! I cant carry on like this and have now stopped have sex alotogether as it disabling me the day after! please help...