3 positives but negative at the doctors

Da

Last night I took an expired pregnancy test I had lying around on a whim, thinking it would be way too early to tell, and I got a positive. I took another and got a positive again. So I went out and bought a new pregnancy test, not expired, and took it first thing the next morning. It was positive. I went to the doctor today though, and they did a urine test, and it was a negative. It was disappointing to say the least. Anyone else experience this? Did you end up being pregnant?