Swelling and itchiness

Hey ladies! I'm a FTM, so never really sure if what I'm experiencing is "normal".  Pretty much the entire time I've been pregnant my lady parts have been swollen (which I know is normal due to increased blood flow), but sometimes (maybe 1-2 days/week) the outside itches like crazy!! It's a totally different feeling than a yeast infection and my vagina itself if totally fine. I haven't had sex in months and I'm super careful when I wash or shave the area. I can't seem to pinpoint something in doing that makes it flare up, it just seems to happen randomly. I have an apt tomorrow, but would rather save myself the embarrassment of having to ask about this with my husband in the room if it's just another one of those fun pregnancy side effects. 😳