Itchy after sex

Ok I’m allergic to latex in condoms! Well I had sex with my boyfriend last night, unprotected, like always, I’m pregnant, could he be using condoms with someone else before coming back to me????

Why else would I be so itchy around my vagina area, I think he’s cheating anyway but if someone could tell me if the condom effect would still be on him after a shower is that possible?????? I’ve been checked for STDS, all clear!!