Yesterday, I Had Given Oral Sex To A Guy. All

Yesterday, I had given oral sex to a guy. All of a sudden, as I had let him travel farther back, he started to notice that streams of red was coming down but he wasn't sure if it was from my nose or mouth. When I had stopped, the blood continued dripping from the back of my mouth. He stopped in fear he was hurting me. Could it have been a result of going too rough?