Period

Gigi • I`ve been with my SO since I was 19. We have 3 beautiful children and I still get buttflies thinking about him. I`m a lucky lady!
What do consider your first day of your period? Is it the first wipe when you notice a pink spotting, or is it when you see red? Just curious and since joining its made me wonder about my own. I just started spotting yesterday and a lighter flow today but my period wasn't due until Saturday. Do i count yesterday as day one?