If u look up green discharge it talks about baterial infections you need to get checked to be sure.
Sounds like you might have and infection. I get like that sometimes, but its because our vag gets swollen as pregnancy goes on, and the extra blood pumping through it, that about an hour or so after sex, It burns and is really sore but it normally goes away. however I don't have greenish discharge. I would def see a dr on that.
I would go to the e.r. green discharge is a sign of infection