Sweaty boobs!!

So I hope this posts gets some if any kind of response! My last few posts on here didnt get much and I didn't really get any sort of response on ovia.

This is going to sound weird but for the last 2 weeks or so, the week before my period, while on my period and after, I have had excessive sweating from my armpits! 😫 but it is ONLY when I wear a bra?

I don't know the best way to describe it but it just feels like all this heat from my boobs is trapped in my bra and making me sweat? But the bras a wear are lightweight, as I prefer sports bras and bralettes. They're not tight and restricting, and they fit me fine as in like they're not too close to my armpits.

But if I take off my bra I'm completely fine, no sweating, no hot feeling. I don't know 🤷🏼‍♀️ has anyone else experienced this? It's so weird and uncomfortable! The second I'm in the door I start taking off my shirt and getting into the shower 😩

And yes I wear deodorant 😂