HELP IDK WHATS GOING ON

Before anyone comments saying "it's an STD" or anything along those lines I HAVE been tested and do not have anything! Tonight my husband and I were having anal sex and then we moved it to the front well after he came inside of me he went to go wipe himself off and I went to the bathroom after him and there was bright red blood all over the towel as well as coming out of me!! Now I already had my period this month  it ended on the 13th. This has never happened before. I don't know what to think! Any advice?  ( HE DID wash it off) didn't feel like it was necessary to go into every little detail. 🙄