Hi
GPs not referring unless there's a lump is utter rubbish! Both myself and my sister have been referred for pain and no lump (we are in different areas/GP practices).
I had on and off pain under my left armpit, (no lump), and my gp referred me for a armpit scan, but when I got there they did a mammogram and refused to do a scan as the mammogram was clear (despite the fact my gp requested a scan not a mammogram). The doctor there said it is probably muscle pain, which I knew it wasn't, ansd i asked if it could be due to peri menopause, I can't remember what he said, but I could tell he'd never heard of that before.
Over a year later I went back to my gp as I was still having the pain and asked to be referred but to ensure I get a scan this time, to check the area where the pain was, as was getting worried, especially with all the lymph nodes in the armpit, and I was now starting to get pain at the side of my breast running towards my nipple. I did get my scan this time and luckily all was clear.
During this time I did a lot of research and found out that breast and/or armpit pain is very common in peri menopause, and a lot is only on one side.
I would still press for a mammogram and scan, just because it's common in peri menopause doesnt mean that it's nothing more sinister, and you would think the gp would want to refer to protect him/her self from any comeback.
I think it is peri menopause due to being so common, but I'd still request the mammogram, even just to put your mind at rest.