Okay so ive missed my period for 2 days but i took a pregnancy test but it came out negative. i waited two weeks before taking the test.

Tests are accurate: Today's urine pregnancy tests are very accurate and not affected by foods, herbs, common illnesses, sexually transmitted diseases, or medications. A correctly done test will give a very reliable result by 3 weeks after sex (3 weeks after possible conception) or 1 week after missing a period. If done sooner, a positive result is likely real, but a negative result may be due to testing too soon.