Can i take a pregnancy test the same day i miss my period ?

You can: But it may be too early to be positive. Use a first morning specimen as the urine is usually more concentrated and therefore more likely to show a positive result earier.

Sure: Pregnancy tests check for b-hcg which is produced by the growing fetus. The longer you are pregnant, the more chance you will have enough b-hcg to be testing positive for. If you can be patient, wait at least a week after your period does not come, and then check a test. If you can't wait, go for it, good luck to you.