Has anyone ever done Home Pregnancy Tests and Blood Tests and all come back Negative but weeks later found out they were in fact pregnant? 3 days before periods are due I did a HPT which came back positive, then 3 days late after my period was due I did a blood test that came back negative. It’s been almost a week and I still haven’t got my periods. Has anyone been pregnant for say more than 4 weeks and not know it? I have had many of the common symptoms over the last 2 weeks..