Please answer, can't stop worrying :(?

I'm 16 yr old female, I suffer from panic attacks, depression and anxiety, I'm on a antidepressant called Sertraline and I'm a hypochondriac about my health. I'm always assuming something is wrong with me & that I'll die ect & I look everything up on the internet. Anyway, the problem is recently I've noticed that I have small white bumps inside my inner lips of my vagina (near my pee hole) I do get alot of white thick discharge and always have done... It does smells & itches too, I try to stick with cotton underwear aswell.. I'm a virgin, but about 4 years ago I let someone's penis touch my vagina, It didn't go in or anything just rubbed the outside (don't know whether its relevant) but I never noticed anything wrong & he was pretty inexperienced. Is this anything to worry about? I'm scared to go to the doctor because of all my mental health issues & people involved ect they would probably get to know.. I can talk to my mum about anything though. Just pretty embarrased.. Is it a yeast infection or anything? So worried any advice or help would be great thank you