Hi all. Small question. Been ttc for quite some time but nothing's happening so now tracking my period and trying to keep a note of everything. My question is what do you class as the first day of your period? Both last month and this month I've bled very lightly for 3 days (tmi but only blood when wiping) and then it's been heavy for 2-3 days. I'm confused as to what I class as day 1. Anybody help?