@lilianna I called the nurse phone number again and got a different nurse, who looked at my MyChart messages (and their timestamps) and graciously assured me that a nurse would be calling me back that day (yesterday). In the meantime, the doctor was responding to 2 of my MyChart messages. A nurse did call me back and we talked through some of my remaining questions, which we decided were really questions for the doctor. So instead of sending more MyChart questions to the doctor, I decided to wait until my follow-up visit to ask them.