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

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

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

Is a baseline blood test really necessary before starting something like this? Same for me with ginkgo biloba, unfortunately.

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

Is it normal to feel worse before better? Nobody told me that. Currently on storage at home myself.