Sperm allergies...?

So I heard a horror story once about a girl who waited until her wedding night to have sex with her husband, and she found out that she was allergic to his sperm...? I didn't know this was a thing, but now I'm super scared. I'm waiting to lose my virginity until after I'm married, but how do I make sure this doesn't happen to me? It would really suck to get married and then find out that his sperm gives you a rash...