What Causes Itching In Genital Area And Swollen Bump Near Clitoris?

I've been feeling really itchy lately down there. At first I thought it was the type of underwear I was using since Ive always been sensitive with that . I'm also pregnant . I was intimate with someone but we are no longer together . I noticed like a pink swollen bump by my clitoris. I'm scared because I have no idea what's going on