Burning Sensation/Itchy Vagina Opening

I’m a bit worried and scared right now.

So I’ve been masturbating my vagina for the first time using a hairbrush handle (due to curiosity) it hurt a lot since its my first time and I’ve never had sex before.

After that, I felt like I have to urinate every after 5-10 mins and I have a trouble holding on my pee.

2-3 days after that, I felt weird itchiness around my vaginal opening and kinda burning sensation as well. I’m scared that I might have some viruses/bacteria on my vagina.

Anyone had this before? Please comment thanks!