Pain during and after sex?

Kayla • 22. In a happy, healthy relationship :) 3 positive HPT 4.30.15
A couple of months ago I was put on an antidepressant for possible interstitial cystitis. I had a pelvic ultrasound and an external ultrasound, and was tested for a number of stis. Everything came back clean.
I'm not sure if I actually have IC or not, but the past few times my boyfriend and I have had sex it's been excruciating the moment he's in (sorry for the tmi) and after. At the moment the pelvic pain and discomfort is so bad that I can't get comfortable enough to sleep.
I should mention, I'm ovulating and we didn't use a condom... -__-
Does this happen to anyone else? What can I do?