Oof, you don't go down to zero platelets without something gone seriously off the rails. Seems like it got caught right in time, but wishing for the best in the follow-up.

This being said, a problem with blood tests is that a layperson won't know right off the bat if a value outside of the normal range is ok or a life-threatening issue. I understand it might introduce a lot of complexity for labs and that there's some level of "big picture analysis" involved that will require some human intervention, but even just a color-coded line for WBC/RBC, hemoglobin and platelets could already go a long way, as OP's case demonstrates.