Itchy Vulva -but doesn't seem to match symptoms of yeast infection

I've been experiencing itchiness and sensetivity on parts of my vulva and some right inside my vagina. There's been no change in discharge no bumps or smell, doesn't hurt to pee, only looks inflamed when I've been rubbing where it itches. I can ignore it (like it was bothering me 10 min ago & i decided to not mess w/it and now it doesn't itch). Once I start messing w/it, it seems to itch more. It started a couple weeks ago, a day after I had to sit outside in the heat for a few hours & didn't get to shower till late. Didn't itch during my period and I honestly forgot about it till today when I rubbed around to see if it was still sensetive & it itched again. I have been having sex w/o a condom lately, but recently tested STD free and have had the same exclusive partner for years