Am I allergic to him?

Alliecatt • 22, 5th year pharmacy school student, new to the world of birth control and sex
I am on the pill, have only ever had sex with my current bf, and when he finishes inside me without a condom I get this pretty horrible residual burning sensation. It usually goes on for quite some time (maybe 30 minutes give or take).  It kinda sucks to have to be in pain like this after enjoying myself with him. Has anyone else had this happen?