Whats wrong

I used nair on my vagina, and right after had unprotected sex with m guy. I got a allergic reaction. could he had gotten the same thing??

It's possible but not everyone is allergic to the same ingredients. Just explain to him, you have to other wise he might think it's an STI which would be even more embarrasing.

sounds more like an STI, go to your doctor with him.
if it isnt made for use in your personal area, its for a reason. hope things clear up soon

Does Nair really work for legs? Or does it just hurt your skin?

you should NEVER use nair near your genitals. that is a big no no. only wax, trim, or shave that area. it is most likely from the nair.