I need some kind of embarrassing advise... Nsfw

Im 15 and I have two things I need advise for 1. My boyfriend lives in canada so all we can do is talk about fooling around, but when I do meet him I want to know, uhhh well How to clean myself.... 2. Another thing, I may have an std and it fucking scares the hell out of me and I am way to embarrassed to talk to my parents about it. I have small white bumps on my sack and they itch from time to time. There is no puss involved so I have no idea what it is. ;-; Also I have no idea how the hell I would have gotten it, Ive never had sex before. This is an account Ill use for stuff Im not going to use my main account for. I cant figure out how to do alot of the things on reddit and im using my phone... Edit: lots of spelling stuff ;-;