Hi, I Am A 35 Year Old Female. I Had

Hi, I am a 35 year old female. I had my last period about 5 weeks ago, about 3 weeks ago i thought i was coming down with the flu (nausea, extreme fatigue, body aches and moderate dizziness). During the time i was sick I began having what I thought was another period, heavy bleeding and mild clots for about 3 days. Yesterday I began my period again, which would be my normal cycle. I was having unprotected sex during that time. what do you think it could be