Period??

💑Krys👼 • TTC baby #1 w/ bf of 3 years 💙💜👣👼
So i had VERY light spotting barely non l at night and a little today is it considered my start day of my period? This would be my 2nd cycle of Clomid so I'm confused I use to think first sight of any type of bleeding or spotting would 1st day of period but a couple ppl have told me it's when the first day of actual flow starts .... ? Not sure because I'm suppose to get my period on the 13th