Semen allergy?? Or something?

Sarah
Whenever me and my girlfriend (she is transgender) have sex and she cums inside me I always have an intense stinging feeling for a half hour afterwards. Also when I swallow her semen, I end up getting a sore throat, almost like I have a cold. Is there something wrong with me?? My gynecologist says it just has to do with what she's eating but I'm still a worrybug so I'm afraid something worse is up. :-(