I'm 6 days late

Has anyone else experienced a negative pregnancy test but still been pregnant? I'm 6 days late, I never miss a period ever I've got tender boobs, I'm so tired, thirsty, pee more then usual, in super drained and just different I've also been moody and I have clear / creamy / watery discharge that comes and goes but no sign of af. x2 home test were both shows as neg unless they were super faint positives and I've had bloods taken as the doctors are thinking I could be pregnant. Has anyone else had similar problems? When did you get your first positive?? 
I've been vomiting as well