Someone explain please lol (razor burns)

So I shaved (with a cheap used razor). Yeah I know I'm an idiot for using a USED razor (it was one I had used a few days ago), it was an emergeny. But now my vag is lowkey BURNING. And I have a few tiny little bumps UGH.... but does this happen to anyone else? And if so can you tell me some home remedies?

Thanks!!

Update, I went to the store and got summers eve.... that stuff works yoooo.