Itchy after sex 😳

I had sex on Valentine’s Day and strait away and still now (a few days after) I’m really uncomfortable down there, it’s sore to touch and it hurts when I wash down there (I use sensitive soap) I’ve had to stop using soaps since yesterday as it hurts to much. I’ve had this feeling a few times after sex but it usually goes away after a day or so. But we’re coming Upto the 3rd day now. Hot baths with no bubble bath seem to help but has anyone has the same problem? I don’t think it’s a std but I’m not ruling it out whether I’ve been with him 7 years or not. Any advice?