I'm about 23 days late for my period, when I was a week late I took 4 pregnancy test and they all came out negative. My periods have always been regular, so I already plan to make an appointment with my doctor, but a couple days ago I started getting dark brown blood/discharge, that usually signals the beginning of my period, but then it just stopped. Yesterday it started up again but today still nothing, so I was wondering if any of y'all have experienced anything like this and if so what was wrong?