Clomid questions!!

I'm starting my first round of Clomid next week... I started spotting today(Friday) but by the time I was getting ready for bed early Saturday morning technically(12:20am) I wiped and was full blown bleeding... Would I consider my spotting as day 1 (Friday) or Saturday as day 1?? I can't call my doc til Monday.. can anyone help me out with wat to right down to keep track!!???