I took three pregnancy test one in the morning and two in the late evening two test showed a faint line the last one didn't haven't had a period sinc.

Can retest in 1 week: Home pregnancy tests are very accurate and not affected by foods, herbs, common illnesses, sexually transmitted diseases, vaginal spotting, or medications. A test gives a reliable result 3 weeks after sex (3 weeks after when conception might have happened) or 1 week after missing a period. If done sooner, a negative result may be due to testing too early. A faint positive line is still a positive.