Careful with attribution. You changed the timing, the dose and the season. That is three variables.

File early. The window is shorter than people think and it starts at the transaction. Currently on a foreign prescription myself.

It gets smaller. Not easy, smaller. That distinction kept me going.

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.

Test one thing at a time. It feels slower and it is the only way to learn anything.