I have had that same thing, 6 months no cancerous type showings in mammos and ultrasounds, be sure to come back again in 6 months, they would actualy chart the mammos, to see if any of the cysts/fibros/calcifications showed any changes.
Yeah, I was worried, why are they amking me repeat mammos every 6 months vs once a year? Heck, I thought I was gooing to hear that "C" word, then after discussions, with the doc and specialists, I learned about my condition. I had several kinds of "lumps" removed, one I got scared when I saw that nervous look on the docs eyes, after the solid mass couldn't be aspirated for there was no fluid, it was a solid lump, they told me I couldn't put off having the biopsy and removal, so I got up the courage to go with it, I felt so relieved when I awoke and was assured it was just a lump, no cancer. I am proned to lumps, since I had a child and got "old" I do not get that, if so not as often as when I was young.
I spent almost a whole summer in and out of minor surgeries on both breasts for sebaceous type cysts (they related it to my acne stage in life)though they were superficial,unlike the deep lump I never realized existed,these still were scarey, and then worst of all they would get absessed near the suture sites, it was a mess of a summer, way back in 80 - 1981.
The lump one was in 91, that was more scarey cause of it's size,feel,and just the docs reactions, I felt that was a serious one.
Hang in there, GL, I'm sure all will be fine. Do you have a job? If not try to get one or do volunteer work, it helps take your mind away for a bit.
My world is so crazy, I do not get time to dwell on my physical stuff, but do not neglect it either.
It seems you need to try to channel your energies into something productive, even housework helps, sounds funny, I know, but it can.
BTW
When I last had the scare of breast cancer, 2000 - 2001, I had said out of fear, that I wouldn't go through chemo or anything, to my former T., he said that was foolish, after being "really" scared I considered if I needed it I would go for it, for the love I have for my son and family means too much to leave, so if there would ever be something that can keep me from leaving them, I'd do it.
One never knows how valuable life is till you lose a loved one, which I have, and have come to realize life is a precious gift, don't waste it.
Take care now,
DE