After sex blood TMI

Hey guys. I noticed with my last bf every time we have sex there is a bit of blood on the panties or bed. Even once he saw it and got freaked out. I have sex like every 10 years 😪😪 and this is my longest regular sex cycle as well as a steady relationship but I’ve never had this happen before. Only since we started having sex. I scheduled an appointment at the doctor’s but just wondering if anyone has had this before and if it can be a serious issue. It literally just happens during and a bit after. Very light smeared blood mixed with the “wetness”. He is a bit rough with fingering so I also thought that’s what it may be. Thanks girls!