An inconclusive account is useful if it stops the next person mistaking a story for a controlled comparison. How long have you been on nicotine?

No wrong answers, and yours is a good one.

Reference ranges differ between labs, so comparing two reports is close to meaningless.

You are not imagining it and you are not being difficult. Document it and take the document in.

Bring a list. Embarrassment makes everyone forget things, including you.

Photograph everything before you open it. Ten seconds, settles most disputes. Not on a scheduled substance but the pattern is familiar.