Shavinggg help🤦🏽‍♀️

So recently I shaved down there and everything thing was fine and smooth for a couple of days but then I started getting a lot of bumps ( some where even white) and it started itching... i shaved before and it itches but I figured it was because I was younger and I did something wrong. But after a long time I tried again and I still itch a little. I’m scared and I don’t know what Im doing wrong... any tips for next time?( I’m 15 and not sexually active and loveeeee having a full bush at times but sometimes it nice to feel down there and not feel any hair😂 plus I don’t want any of these problem when I do become sexually active🙃)