Is a baseline blood test really necessary before starting something like this?

What do you do about the fee? Do you just pay it?

How do you tell the difference between the drug working and just a good week?

Following this because I am in the same place and have no idea what to ask at the appointment.

What is the first thing you would read if you were starting from zero?

Sorry for the basic question, but how do you actually start one of these diaries?