Can you have 3 positive prgenancy tests but not it show in a blood test?

No, it is not possible to have three positive pregnancy tests and a negative blood test. A pregnancy test measures the levels of human chorionic gonadotropin (hCG) in the urine or blood. When a woman is pregnant, her body produces hCG, which can be detected by a pregnancy test. If a woman has three positive pregnancy tests, it is highly likely that she is pregnant, and a blood test would also confirm the pregnancy.