Day 3 testing !?

Brittany

Everything im seeing online says to do day 3 bloodwork on 3rd day of Full Flow.. but I usually spot for 3-4 days then 2 days heavy flow then another 3-4 days of spotting..

im pretty sure my dr. told me to go 3rd day ...of my spotting. (Which is tomorrow)

Im unsure if I should go tomorrow or wait for “full flow” 🤷🏻‍♀️🤦🏻‍♀️

Opinions!? Please and thank you