When to start cycle day

Shelby

Should I start my 1st cycle day the day I started spotting? I started my MC 2 weeks ago but starred off super slow just small amounts of spotting till last Wednesday had to have emergency D&C last Friday just stopped bleeding confused on when I should start <a href="https://play.google.com/store/apps/details?id=com.glow.android">tracking ovulation</a>