What Causes Clitoral Itching And Discharge After Intercourse?

Hello! 2 days ago my boyfriend performed oral sex on me, followed by unprotected sex. The next day, my clitoris was really red where his tongue was. Later at night, I noticed a thick white discharge. This morning its really itchy. Never had this before. We both get checked regularly for std's but are negative. We've only been eachother's sexual partner for 2 years. Help!