What Are The Chances Of Conception While On Contraceptive Pills?

I am on Loestrin 1/20 and for the past four months i haven't receieved my period. I stopped taking the pills about two weeks ago and had accidental unprotected sex two days after i stopped taking the pill(no fluids were transmitted into me according to the guy). Since I wasn't getting my period all those months does that mean I wasn't ovulating either, so that I won't get pregnant even after having sex two days after last pill?