“Why would my throat be itchy if I performed oral sex on my girlfriend and she’s a virgin?”
There is not a lot of information in your question so here are a few thoughts. Usually, if the itchiness and slight soreness goes away after a few minutes then it is not worrisome. However, if the itchiness and soreness is there a lot and gets worse with oral sex or just will not go away, then you would need to make an appointment with your care provider to evaluate the symptoms further.
We hope this helps!