Confused!!

Catherine

So today I went to the dr 3 weeks after being told I'm not pregnant after 2 at home positive test 3 in office negative and even a blood work negative just to be told today 3 weeks later that I'm pregnant. I am so confused and not even sure if I believe the dr. Just 3 weeks ago my lab results showed I was no where close to being pregnant now I'm being told I am....