the last time i had my perior it started on the 2nd of May. I started bleeding this morning so i firgured my period came super early but when i went to change tampons there was hardly anthing there and mine is always heavy. I looked to see wht my most fertile days were and they were between the 7 to the 17. I had sex about 3 times during that time and one of those was on the 17th. Could i be bleeding becuase the egg is fertilzed and burried in. if not wht do you think it is?