Vag Problems! Help!

I've been getting these itching episodes and while water helps it didn't completely go away. I started taking probiotics but it needs time to take affect and also vitex. Anyway, I looked with a mirror to see if anything was visible. I haven't had any strange discharge or anything, and my hymen looked almost completely gone! I haven't had sex and I don't touch myself that way, so there's no reason for that to be true. Are these in any way connected? Did I hurt myself somehow and then get an infection? How do I get rid of this?