I'm 6 days late for my period however 6 tests show i am not pregnant. i have been traveling and i also had a kidney infection and have had lower backache. am i pregnant, could i be pregnant how can i tell. i previously had a stillbirth on 2/11/18.

Tests are accurate: 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, such as less than 2 weeks after sex.

Re do test: You should repeat the test in 4-5 days, use first morning urine and follow the instructions for the test carefully. If you still have doublt get a blood test for HCG level.