Susie, First and foremost - 
I had a scare two years ago. I went to my mamo expecting to have an all clear. My self-exams were always just fine as best I can tell, but I'm one of those women with "bumpy" breasts. So it was shocking when I was told they wanted a second. The second came and went and they told me to see a surgeon for a biopsy. I swear, I spent more time feeling my boobs that anyone needs to, wondering what it was they saw I couldn't feel. Turned out to be microcalcifications, apparently fairly normal, unless the cluster.
I was 5 lbs too fat for the stupid machine for a needle biopsy so we did the whole deal in the operating room. Turned out to be nothing, but it was so scary, so I have some idea of what you are going through right now. But as I'm sure you know, there can be many reasons for your symptoms and not all lumps and bumps are caused by cancer. Sometimes doctors just need to rule things out and they can't unless they take a closer look.