its sore because he was sucking on it to hard and that's why it hurts give your vagina a rest for about three days our you can hurt it worse
I would try taking a warm bath first. It may just be agitated and need some TLC. Gently clean the area with mild soap. Don't use bubble bath. When you get out of the tub, gently pat it dry and don't put any panties on for a little while. Let it air out and get some down time :)