If you feel as though the doctor is not listening to you, make an appointment just to touch base & tell your feelings about it. Make sure that they understand that the appt is just for that. If he/she is still not listening to you, then very calmly tell the doctor that you appreciate the time, but you will find another doctor.
Please keep in mind that the doctor is also stressed out & probably having to meet a certain quota of patients every day just to make ends meet.
In the end the body you are discussing belongs to YOU. There are plenty of doctors who will listen.