Advice! TMI....

So because I am Pregnant my husband does not worry about wearing a condom or pulling out. Every time he cums in me, I have to go clean up. ( makes me feel gross) after doing so I have the worst itch! Even after a shower I have the worst worst itch in my vagina!! It takes hours and hours for it too go away. Now neither of us have any diseases and we were each other's firsts. Could I be allergic to his cum? I'm just trying too find some relief?