Blood after fingering?

Hi y’all, i have a question. so my last period ended on 1/15 and ever since then whenever my boyfriend fingers me i come home and go to the restroom and it’s a weird mixture of maroonish discharge with a texture of whatever it’s called that is what happens when you get aroused. i don’t really have any idea why this would happen, i lost my virginity 3 years ago and have had action since then so i don’t think it’s the “cherry being popped”. could it be his fingernails are scratching the inside and that’s why? or excess stuff from my last period comes out when it happens? any ideas/suggestions would be much appreciated, low key stressing.