Latex Allergy? help

Tasmine
Can anyone tell me what would happen if you had a latex allergy and had sex with a latex condom?  I've never come into contact with latex before since everyone uses latex-free gloves and such.  Can anyone just kind of tell me what happens if you have any experience?  Bc I think I'm having a reaction-not severe, and I can't quite tell what it's from.  As far as I know, I'm not allergic, but like I said, I've never come into contact with it before.