If you, overall, like your doctor, consider he might not have received the message. So often the staff can drop the ball or he's been out of the office, etc. I know exactly how you feel.... you are so worried and you feel ignored, and abandoned, like you don't count. It is a very lonely feeling. This is a good chance to practice a little push-back at your doctor's office. I usually handle things with a bucket load of humor. If it were me, I would call up the office and say.... Hey, what happened to my message? Did the sticky-note fall off his desk? I called about some concerns I had with my mammogram and he hasn't returned my call. As you grow older, you have to become your own best advocate when it comes to healthcare. You have to do your own follow-up and what has happened to you is, unfortunately, extremely typical. So I wouldn't dump the doctor just yet.... unless you really aren't satisfied with his overall care. You have to "ride-herd" on your healthcare.... even your personal doctor! IT is a royal pain.
Take care, Sharon