Last week my mother and I both had routine mammograms.?

This week we both received letters from the hospital saying we need additional views and tests done. I have to have another mammogram as well as an ultrasound. My mother just has to have another mammogram on one side. My family has no history of cancer. Mom's in her 80's and I'm in my 40's. I know I'm probably borrowing trouble, but I'm beginning to get worried. Any similar experiences? Oh, neither of us had found a lump...we were just getting the tests done routinely.