Yes, I found a lump under my arm, which was painless, irregular shaped and did not move. When the GP examined me, she also found a lump in my breast. This was pea-shaped with more clearly defined edges. Despite the fact that the breast lump had been there ages and I thought it harmless, she referred me under the 2 week rule, as she said there was a small chance it was cancerous. The lump under my arm she thought less suspicious.
Obviously, I was worried as the breast lump had been there 3 years or more and I assumed it was a cyst or part of my nipple.
The hospital were fantastic, efficient, caring, happy to explain things and answer questions and within the space of 2 hours or so I had seen the Consultant twice and had two xrays. All was fine and I did not even need a biopsy. In my mind, of course, I had cancer with secondaries.
It is natural to be worried, but really, most lumps are nothing to worry about.
The waiting is awful but there is a higher chance everything is normal than not.
Best of luck.