I ovulated late this month, and had unprotected sex while i was ovulating. I have felt bloated, constipated, nausea, vomiting, frequent urination, cramping, sore nipples, sore breasts, back pain, and flutters in my uterus. I had light pink spotting 7 days ago, which was 4 days after i had unprotected sex. Could i be pregnant? If not, what could be the problem?