Rev/dex EAP and sinking phosphorus levels

This question is for anyone in the Rev/dex EAP. Has anyone else had a sinking phosphorus level? Mine has gone from 3.3 mg/dL before the trial to 2.0 in Feb and 1.3 last month. They’re only checking it every other month, so I have no results from today. My calcium is normal, but I have no idea what my vit D levels are. I need to schedule an endo workup.

I searched on phosphorus and found this info:

http://www.mmeade.com/cheat/phosphorus.html

My diet has not changed, so I can’t think of another reason for the drop.