Urine analysis whilst on cambridge diet????? help

Hi there I am in week two and as I work in a hospital have dipped my urine to check for ketosis. Over the past couple of days, I have had increasing amounts of ketones as one would expect, but also large amounts of blood which could be due to menstruation and large amounts of protein.

I know that ordinarily, protein in the urine is a cause for investigation, but is this the case when on the cambridge diet or is it to be expected? In myself I feel fine and wondered if someone could advise if it is normal to have high protein levels?