So I spoke to a different GP today about this, didn't want to but mine wasn't available until 8th March according to the rude receptionist without even knowing what the concern was said it was routine. Anyway, the GP said Costochondritis doesn't spread to your breast, but then didn't give me any answer as to what or why I'm in so much breast pain. Didn't even examine me, so thats another moan tomorrow, because I've honestly had enough of them, their are 2 GP's who I feel like listen, and surprisingly both male, 1 I've known since all my fibro problems started nearly 9 years ago and 1 I've known for just a year. The rest are a waste of space and they wonder why I only what to speak to these 2 ever!. Just thought I'd let you all know what I'd been told so far.

I have pain under my left breast like my heart. But all test came back fine. Even the cath they done on my heart. I know I got to sit down if I’m standing up

Got the all clear at my cancer appointment thankfully. My chest is inflamed and full of swelling. Now waiting on steroid injections for Costochondritis

You might have cysts in your breast s causing the pain .there is no treatment but they say if you avoid caffeine this will help. I do not find avoiding caffeine helps.

Not old enough for a mammogram yet. But the breast pain has been really bad this weekend, I will bring it up with my gp next time I speak with him, just in case.