..... what could this be?

Im posting only because this is the first time anything like this has happened to me.

Anyway today i went pee and when i wiped there was a little pink on the toilet paper, i wasnt sure so i wiped again and there it was, very faint small amount of pink.

Now last night me and my bf had sex, nothing special i was really tired and pretty dry -_-

It actually was kinda painful tbh...

AF due in 2 days.

So im wondering is it from the dry sex is it implantation bleeding, what?