Following this because I am in the same place and have no idea what to ask at the appointment. Not on dihydrocodeine but the pattern is familiar.

Most of the popular protocol is borrowed from a clinical population and applied to healthy people without comment.

Do you contact the customs office or the carrier first?

Function over score. Same for me with amoxicillin, unfortunately.

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

File early. The window is shorter than people think and it starts at the transaction.