hello Ali, so sorry to hear this is happening! I haven’t had my op yet so can’t really advise. But, it sounds like a skin irritation. Maybe it’s the material of the bra, or maybe it wasn’t the right size for you.
It could be that your boobs are still going through changes and so the skin sensitivity is only temporary.
I don’t know if this will help you at all – but about a year ago I got exactly what you’re experiencing all over my boobs – severe itching, skin irritation, rashes and bumps all over them. It lasted a month or two, I used soothing creams on them which made it a bit better (got them from the GP). Then it went by itself. Have no idea what caused it, but it was extremely uncomfortable. So it could be like that – just an irritation that will go away by itself.
Either way, your best bet is to have a listen to what the doctor says, and then use any of the appropriate creams etc. Maybe go back to the shop after having a chat with the doctor and hearing what he/she has to say. xxx