I have an itchy vulva and it won't go away! Please help.?

Ok, so first things first, I haven't had sex since April. Around the end of May, I got a little too frisky with my showerhead and my lady bits were sore for the day. The next day, they stung. And the next day. So i googled some help for vulva stinging and burning and they said to use aloe. I only had aloe with this weird Ice-fresh stuff in it but it worked pretty well for a while. I decided to stop using the aloe (since it wasn't actually pure aloe) and use vasoline instead. So i used that a while. But after a while it kinda subsided to a point where I could ignore it. Recently I was at the pool and was hanging out on the side with a friend. I think my crotch was too close to the water jet cos it started stinging REALLY bad and i got out and got dressed and we went out for ice cream but the whole time I was clenching my fist, digging my nails into my palm to try and redirect the pain. It didn't help much. But once I got home and got in bed and I wasn't moving I was fine. So i decided to get something to help. I picked up some vagisil (or the target generic version) today. I hadn't been having seriously any irritation today, until AFTER I added the vagisil! My vagina is itchy and after i scratch it it burns! I've found that after i do some solo sex I'm blissed out enough to not feel the sting, but now my clit and inner labia have started to itch too so I can't pleasure myself without it burning and itching! I am really embarrassed about this and do NOT want to get my mom to take me to the gynecologist unless absolutely necessary. Please help me!!! (I'm 16 btw)