Can I still be pregnant?

Im 17 days late on my period I've had 3 negative results on home pregnancy and a blood test came back negative.. When I was 3 days before my due date of period I had spotting but it was a pinkish colour. I went back to the doctors because i wanted second opionion my doctor said she wasn't satisfied I've had blood test I'm waiting for the results. I've posted because I want 3rd opionion because I've never missed my period this late and always came on time.