I had two positive pregnancy test on august 1 and 2nd. Had app to confirm on Aug 14th urine came back neagitve also did blood work on 14th and 16th and nurse said my levels were the same and thats a negative. I have gained 6 pounds, very bloated even get quick sharp pains in breast on sides they come and go often. What could be the reason for false positive. I'm not on any meds with HCG in it either. or could this be a false negative