Can you not be pregnant even though test is positive?

Answer: If the pregnancy test is positive, then you are 100% pregnant. It will detect any amount of the human chorionic gonadotropin (HCG) at it's minimal detection limit. There are no false positives in pregnancy tests.

That being said.... however, it is possible to have a chemical pregnancy of which the embryo has started to implant but stopped. It will be reabsorbed back into your uterus and will be shed when the menstrual cycle does begin. The minimal amount of HCG that can typically be detected by urine home tests is 25 mIU/ml. So... technically yes, until the levels drop back below the minimal amount you will test as positive for pregnancy even though you are not.