I'm so afraid (I am contacting the GP tomorrow). 
but I've found a lump it's quite sore but actually feels better after a hot compress, if left without a hot compress it feels like it's catching under my arm. 
As I've said before the hot compress has reduced this catching sensation so I'm wondering if it's something more to do with inflammation.

ive recently stopped breast feeding in the 2 months so I am aware that you can have some differences in tissues feeling or new lumps. 

However the worry is making me Ill, my heads already got me in the very worse case scenario and I don't even no anything yet. You see my daughter is only 7 months old and has a life limiting condition. As well as this I've had 4 family members in the last 5 years pass away from various cancers, leaukeamia, skin cancer, lung cancer and most recently my mum 2 weeks after the birth of my daughter to triple negative to breast cancer. So understandably I'm petrified. 
Mum was tested for the BRACA gene and was told she didn't have it. The only thing it's the pain and lump is exactly the same place and size as my mums started. 

im trying my hardest not to worry but I'm so afraid my little girl isn't going to have a mummy.