It's best to test on the day of your missed period or a day after. Once you get a positive, please get your thyroid checked early because regular doctor follow-ups are so important from the start.
Testing 1 or 2 days after your missed period is ideal. If it's positive, make sure to book an appointment with your gynac to confirm with a blood test.
I tested around 4 days after my missed period and got a very clear line. Waiting a little bit helps avoid the confusion of faint lines, so try to have some patience, dear.
I remember that anxious waiting period so well, my heart would beat so fast! Try to wait until your missed period day for the most accurate result, sending you so much love.
With my irregular cycles due to PCOS, I waited a whole week after my expected date to avoid disappointment. If you have irregular periods, giving it a few extra days is always safer.
Haha, the urge to test every day is so real! But seriously, wait till your missed period date otherwise those cheap test kits will just drive you crazy with light lines.