CD1 is when you have full flow,so sun or monday...
AF just keeps messing me up.... aahh... yesterday I basically had nothing - today I am back to brown blood, cramping, nauseous, and a huge headache..........aaaaaaaaahhhhhhhhhhhhhhhhh
i think u should buy ovulation kit. and start to test from 14th day. spotting is count as day 1st.
I was told whenever you have anything that is day 1. Usually I start brown in the morning and then it's usually full flow by that evening. Hopefully, someone else can help you determine better than me.