Lump below crease of breast along my rib towards the back

[GeoHan]

In 2007 I had two lumps in my left breast that turned out to be invasive ductal carcinoma stage 4. IDC is cancer that began growing in the duct and is invading the surrounding tissue. The abnormal cancer cells that began forming in the milk ducts have spread beyond the ducts into other parts of the breast tissue. A week after I found the first lump I had a lumpectomy. At that time I opted to have a bilateral mastectomy as it was already growing beyond the milk ducts. I went through chemo for a full year, then waited 3 months and went through 10 radiation sessions. They said it was gone. A year later I discovered a hard lump the size of a kidney bean up against my rib cage and when directly to my oncologist who said it was most likely a tumor made of fatty cells, told me to keep an eye on it for any abnormal growth, and that was that. I was somewhat upset that a biopsy wasn't done because now the fear the cancer is back was rolling through my mind causing stress and anxiety. Since I didn't opt for reconstruction I never wore a bra again, that was until last week. I forgot about the lump after a few years because it wasn't painful. Last week to my horror I found it again because a friend wanted me to try her mastectomy bra, and since the lump lay right under the crease of where my side breast tissue would have been, but under the crease, to my horror I found it again and it has grown into a 3.5 to 4 inch long by 1.5 inch wide hard set if nodules that seem attached to my rib. I went to the walk in  clinic today and this doctor took my concerns very seriously, and told me to come back on Tuesday to have a proper biopsy done and have it sent off to pathology. First I'm really angry that the first doctor didn't take my concerns seriously with my history, and secondly I've got this terrible gut feeling the cancer is back. It's not painful unless I start messing with it, squeezing it, rolling the two that are mobile around, but when I lift my arm I definitely know it's there. Has anyone else experienced a lump like this before? What are the chances with my history of it being benign? Cancerous? He says they are going to use some kind of round punch, take out a sample, then put a couple of stitches in...The worst will be the waiting to hear what it is... I'll let you know.