Itchy Vagina. 12 Years Old?

I am a twelve year old girl and for a few days now my vagina has been red inside and itchy. When I itch it is quite sore. I can urinate OK and I have no discharge of any sort. I am embaressed to tell my parents. Is there anything I can do to get rid of it? What is it? Is it normal? Also I have just finished a course of antibiotics for a flu.