Bras and boobs

It’s weird, my bras fit me, but lately both me and my mum have had issues with like breathing or tightness right under our boobs. Not tightness of the bra. More an internal feeling like it tightens in chest and it feels hard to breathe.

I’ve been wearing a Bralett lately to help but most of my bras have wiring.

Has anyone else had this problem?