Help!! Positive hpt negative at doctors

Samantha
Ok so I took a test on Saturday and there was a very faint line so took another Sunday and line was clearer I then took another first thing which was positive I then took a clear blue digital at around 9.30 which came back pregnant 1-2 weeks. I had to drop a sample at the doctors I used the same urine for the clear blue as the one the doctors used yet there getting a negative result. I'm so confused I have 4 positive hpt don't know what to think. Any help is appreciated