Need advice

I've taken around 6 pregnancy tests the last few days, and all have been POSITIVE. I went to my general physician today to confirm it with a blood test. My dr wasn't in so the lab tech called me back. I came for bloodwork since I'm still four days before my missed period. She insisted on doing a urine sample first. It came back negative, so she basically refused to do a blood test.

Has anyone had a negative urine sample at the dr, but had positive at home and still been pregnant?