When is it officially CD1?

[DuRezidal]

I have always counted from the day my period 'properly' starts (i.e. Need a tampon). However I do seem to spot for a day and a half prior (sometimes up to 3 days).

Should I be starting my cycle from the first day of spotting? Or am I doing it right?

I am using the CBFM so would help to know!

First day of flow according to memory...

So when I need to use a tampon?

I would say from when flow is continuous rather than spotting and when you need a pad/tampon.

Thanks that is how I have been doing it but wanted to double check as makes a difference when I start testing with CBFM.