Bleeding after fingering. What should I do?

nat.

For some reason my vagina is super tight and I used to not able to put anything inside and even one finger would hurt me.

But in the last few days I can manage to take two fingers. My boyfriend fingered me today and yesterday and the same thing happened.

I just finished my period last week so it's not my period. I got a faint blood on my panties and I got a cotton pad to show it a little bit.

What do you think happened? What should I do?