I had my mammogram recheck yesterday and all is well. It was determined that the ultrasound wasn't necessary and I only had to wait five minutes for the good news.
Thank you to all of you for your kind words of encouragement and support.
You guys rock!
P.S. I found out that caffeine can mess up the mammogram results, but no one ever tells us these things. It is a good idea to reduce the caffeine a few days prior to and the day of the mammogram.