Please Help!!

So my period was 4/29 and I always have an irregular cycle. I usually ovulate 3 weeks after the first date of my period. Some reason I ovulated exactly 2 weeks after my period. Me and my husband had sex on 5/8, but with a condom and I think I ovulated on the 13th last Wednesday. My breast started getting sore on Friday and that never happens. Could I be pregnant?