Itchy rash under breast solutions?

Yana
If being pregnant is not enough by itself, we get all these fun things like vagina pain and now a heat (?) rash under my boobs. It is so itchy and annoying. I keep scratching it, which irritates my breast even more. I was so desperate today that I put a rash creme on and THEN checked online to see if it's ok for pregnant girls and it turns out that it is best to avoid it... Does anyone have pregnancy-safe remedies for itchy underboob rash? (And since we are on this topic of breasts, any suggestions for cotton bra and sports bra brands?). Thank you in advance!!!