I'm having a bit of a concern during sex with my husband. At the start of intercourse, I'm experiencing some biting or stinging sensation near the entrance of my vagina. I've had sex multiple times before and never had this issue. Also, I've noticed a thick white discharge coming from my vagina, not watery at all. After having sex, I noticed a bit of hard blood, like the kind I usually see during my periods. I'm just wondering why this suddenly started happening. Could it be a sign of something?