How many people have had this happen?

I took at least 6 pregnancy tests at home including a digital one and they all say positive but when I went to the doctor later in the afternoon they said it was negative. My doctor only does pee tests and doesn't do blood tests. So is it possible that because I went in the afternoon it effected it or that it's early? Idk I took two more tests after I went and they still came up positive. Just looking for some answers on this issue or people who have experienced the same