Stupid question: how do you know whether what is in the vial matches the label at all?

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

Is it normal to feel worse before better? Nobody told me that.

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

How long before you can reasonably say something is or is not doing anything?

Reference ranges differ between labs, so comparing two reports is close to meaningless. Same for me with storage at home, unfortunately.