Hypophosphatemia post Ferinject, blood test

Hi,

My phosphate dropped to 0.45 mmol/l because of Ferinject. Last test was on 17th, and the infusion was on 9th.

I've been taking a medication containing 799mg of phosphate for a week now, but I want to have blood work done this week.

My question is whether I should stop taking it for a few days (and for how many) so that it doesn't interfere with the results and the blood work is as accurate as possible.