Positive tests for two weeks!

But went to doctor for urine pregnancy test and they said it was negative?? Could the test be wrong? I don’t understand I had every symptom and clear positive tests in the time you had to wait for them to process? I’m so upset and stressed and they won’t let me get a blood test and I have no clue on how to? I’m in the UK so people who live in the uk help please

My doctor said their urine tests are the best around but I’ve heard they aren’t? He didn’t even wait for it to process he just glanced a second after looking at it and threw it in the bin are they instant?