help!!! I don't know what's going on with me...

Hello... So I am bleeding out of the blue... Which is weird because this has never happened to me unless I have rough intercourse sorry tmi. But today is my second day bleeding and it is heavier than yesterday. I do have normal period cycles 28 cycle. I had my period this July 12th to 16th and I my ovulation days were from the 24th to 27th and I began bleeding on the 26th. I have no cramping at all but my blood is bright red! What could it be? Anyone ? Please help!