What Causes Severe Pain In Pelvis During Intercourse?

i had a baby a year ago and i am still havin problems with my pelvic floor. ihave been doin my exercises an hav even bought some weights i can use but none of these seem to be helping. i had intercourse for the 1st time a few weeks ago and it was very painful during and for a few days after. And for the last couple of weeks i have been having problem with bowel movement i can feel i need the toilet but the stool will not pass do you think this is all related to my pfm. and ha can i do to improve these problems? thank you