Burning/tingling ribs/bottom of boob

My left ribcage constantly feels like it's almost "falling asleep." 😧 My OBGYN she hadn't ever heard of that, but said it was probably because I needed a new bra. So I went and got fitted for new bras, and got ones that weren't underwire. The new bras fit great! But the sensation is getting worse. Not better! Any ideas what this may be? Or how to help it??