I dont get it 😭😭😭😭

I'm lost for words and just confused now. I used the Walmart blue dye tests. I never had an issue with these before. I have seen positives, evaps and negatives on these tests. I also got 5 positives on it. First response was vvvvvf. I went to see the doctor today and I got a negative on their pregnancy test and on blood test. It just dont get it. I even timed on how quickly the line showed and it was less then 2 mins so I know it's not an evap line plus it's too thick for an evap line. I dont believe in false positives, the doctor even said they dont exist and my mom works for an OB n they all said they dont exist. They wont give me answers either just oh its negative n idk why u just had a postive yesterday 🤦‍♀️. I'm heart broken but trying to stay strong