Monday i went to the doctor and found out that i had a kidney stines,and i was also supposed to start period that day n haven't still but neg pg test?

See below: If stones are just in the kidney, non-obstructing, and not causing pain then no connection to and not the cause of delayed onset of your period. On the other hand, if you are having pain related to the passing of a kidney stone into the ureter tube, then pain (from any cause) or associated stress and anxiety could cause a delayed period onset.