Allergic to sperm?

Every time me and my husband have sex and if he finishes inside of me I have a burning feeling for awhile afterwards like an allergic reaction. It’s painful and has made it to where I don’t want to engage in sex. The last few times we tried with a condom and I was fine afterwards. No pain, no burning, no nothing. It’s not fair to him that we have to use condoms but I want to be able to enjoy it myself. Does anyone else have this issue? What did you do?