Itchy and stinging vag? ?

for about a week now, my vag has been itching and stinging really bad. I'm 13 years old and just got over a cyst in my left . so anyway, on top of the stinging and itching, I have been having thick white clumpy discharge. Also, I haven't shaved down there so it can't be itchy from that. so it's sry, itchy, stingy, with clumpy white discharge. I'm going on vacation in 1 week so I want to get rid of this soon. what's happening to me and how do I fix it??