earliest positive pregnancy test

MT
When was your earliest positive pregnancy test? I'm 4 days post ovulation, and the doctor did a pregnancy test today. I went there because of a UTI, so he tested for uti and pregnancy (I asked him to). Of course the test was negative, and I know that it is almost impossible to get a positive result only four days after ovulation. But now I lost all my hope this month, and am super upset.
How many days after ovulation you got your first positive? I'm hoping no one will say 4 lol. Thanks!