Really bad pain after sex

I'm 24, not pregnant, have had 1 baby vaginally 2 years ago. Well since I had him intercourse has been pretty painful. My gynecologist said its normal. I stopped going to that doctor because they always brushed me off so I'm waiting to get into a new practice but we had sex for the first time in a month last night (it's so bad we rarely have sex anymore) and today I have so much pressure and I feel like I'm cramping really bad and even have sight pressure in my anus (no anal sex) what is going on? I'm seriously about to head to the hospital because I'm in so much pain.