I would still start it on day three and take it for the 5 days or until you CD7 you spose to take it on CD3 - CD7
If you are still unsure call your dr
I was told CD2 to CD6
My dr told me 3-7
I would just ask your dr
I would still start it on day three and take it for the 5 days or until you CD7 you spose to take it on CD3 - CD7