my period has been very regular for many months..and always 6-7days for years. I had unprotectd sex during ovulation time and had my period for 2 days only(was normal not light). no blood for the next 2 days and now i am barely spotting( only when i wipe sometimes. red not brown. Could i be pregnant. I have had headaches the last couple weeks and for about a week b4 i started bleeding, i occasionaly has back cramps. my breast were sore for that week also but not anymore...whats up