You can go to the doctor and explain this new symptom, but that symptom just happen after intercourse with condoms right? So if it was something because a std or whatever should be recurrent not just in a single ocassion.
Check out the condoms that you normally know that you are not allergic from and keep the same brand everytime. Some brands add and change components during period of time and then one of those little components (fragance, acids, etc.) can bother you.