What Causes Itching Sensations Near The Clitoris?

I am a 13 year old girl. My boyfriend has fingered me 4 times and given me cunillingus once. we are both virgins and have no history of STDs. The last time he fingered me, the next day i woke up and urinated. It was then that I noticed an intense itching sensation near my clitoris, and the rest of the day I have had burning aand itching pain when moving or urinating. What are some causes that would explain this? It is very uncomfortable and I am very scared because I don't want my mother to know that we are intimate. We called ourselves being responsible and safe and now this has happened...