Could i be pregnant?

Okay so during my ovulation and the day after (i was still fertile) my boyfriend and i had unprotected sex (like we have been for months) but for the first time when he went to pull out, I dont think he did in time either day. The second day there was definitely his cum leaking from me. I dont get my period for about 10 more days but ive started cramping and i usually dont until the day of or before my period. Should i worry?