Does your doctor have a patient portal? I have 9 different specialists, so I completely understand the phone tag dilemma. Most are good at persisting until they get a hold of me, but others are not. Using the patient portal helps to avoid all of that, as you can have complete communication between your doctor and yourself during office hours or after. It has helped to relieve a lot of stress for me, and gotten me answers in a timely manner. I hope that the doctors can find an answer for you soon. Take care of yourself and know that there others who are pulling for you.