So about a week ago my boyfriend and I had sex. We didn't use protection, but he didn't cum in me. Yet we kept going after he was done.. My period is irregular so I don't know if it's necessary late but I had some spotting today and extremely bad cramps, my boobs have been hurting and getting really big the past few days, the past week I've been constipated and very bloated, is it really my period or could I be pregnant?