I need opinions

My period started on monday, and ended on wednesday, the first day was heavy, the second day was medium for a few hours and then just little red spotting, at wednesday it was like a brown egg white discharge, and I started to have pressure on my pelvis, and the feeling that my period was about to come out again, and I'm still feeling the same, with cravings, nausea and mood swings, is it normal? I never had this happen to me before. I had sex during my fertile week, should I take a test?