I’m not sure what country you are in or how your health system works but from someone working in a clinic in Australia you really should go in and see the doctor face to face to get your prescription. They can then hand it to you for you to take to the pharmacy
This has advantage that you both can discuss any issues side effects problems, update on progress etc, you are in control of when you get the script AND the doctor is not expected to do unpaid work without even reviewing the patient yet taking all responsibility if there is a problem.
Perhaps you could make your next app each time getting your script and putting a reminder on your phone?
Best of luck