Itchy after sex all the time??

EVERYTIME I fuck this guy my vagina is so itchy for days after.. He’s the only guy I’ve slept with since my ex, I’ve been tested and I’m clean but this has been happening for months. It never happened with my ex and I haven’t changed any routines or products or anything. Everything else as far as smell, discharge, etc is normal so I’m so confused on why it’s so itchy. It’s not like a “i haven’t shaved” itch it’s an itch INSIDE 😭😭 has this ever happened to someone? I’m thinking of sleeping with someone else to see if I’m just allergic to his dick or something lol. Also should add that we don’t use condoms so it’s not that