Please don't judge but me and my husband had been together 6 years we've been ttc for a while so I have no bc in my system. Well we are going through a devorce now after years of him lying and cheating on me. So last night I had a good friend come over and one thing lead to another and next thing was we had unprotected sex. My periods skip around but I was in a window. Could I have gotten pregnant? Since my cycles are 15 days apart to 38days.