Hi I'm just wondering if any of you lovely nurses have any reasurance I'm 32 and I've had a swelling under my armpit sort of part of my breast I've had this for about 2 years It does get sore during periods and i do get some weird sensations and tingles through the month I don't take birth control I'm not on any hormones ( single defo not pregnant )

there is no lumps in my breast check every week just have this extra fat under arm assuming this is accessory breast tissue. I have health anexity and I'm struggling with the worry I can't even go to the doctor's because I'm terrified. With me having this for over 2 years and have no other symptoms could this be anything sinister? I am available to send photos over to email if anyone wants to take a look. The swelling feels just like extra fat skin there isn't a lumpy or bumpy feel to it. 

Thank you xxxx