I have an implant but i'm having pregnancy symptoms but the urine, blood and scan doesn't show this?

Tests are accurate: Urine and blood pregnancy tests are very accurate and not affected by foods, herbs, common illnesses, sexually transmitted diseases, or medications. A urine 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 positive result is likely real, but a negative result may be due to testing too soon.