POSITIVE OR ??

so this is now the 4th test i have taken! on the 2nd day of my missed period i took one and got a faint positive .. i went to the dr for not feeling well and she said my urine test came back negative that i was for sure not pregnant so the very next day i took another one and got another faint positive! now today i went and got another test i also got a different brand and i see a line so can somebody please enlighten me!! i’m now on the 5th day of my missed period.. (( the reason i got a different brand is bc for my first 2 i used equate and everyone said there known for faults positives ))