Ideally, you should wait for 7 days after your missed period to use a test kit. Testing on the very first day can sometimes give a faint line and cause unnecessary anxiety. If it's still negative but your period hasn't come, a quick consult with your gynecologist is the best way to go.
Wait at least 1 week after your missed period to get the most accurate result. Avoid testing too early as it can stress you out, and meanwhile, try to keep your diet healthy with fresh veggies and complex carbs just in case.
My mother-in-law told me to test as soon as the date passed, but my doctor advised waiting at least 5 to 7 days after the missed period. Taking the test too early might show a false negative, so have some patience, dear.
I did my test exactly 5 days after my missed period and got a clear positive. Since I had thyroid issues, my doctor immediately put me on regular follow-ups, so if you get a positive, do make an appointment soon to check your hormone levels.
My hospital staff always advised waiting for a full week after a missed period before doing a home test because HCG levels take time to build up. If you get a faint line or are still unsure, definitely book a blood beta-HCG test through your clinic for a clear, 100% accurate result.