Confused

Haylee
So I took a test this morning at home because I've been vommiting and nauseous since Wednesday. When I took it I saw the faint line and though wow I'm finally pregnant again. So I had to leave work early today because I'm throwing up and they want to make sure it's not a virus, and I have to return with a doctors note. I come to the ER and the nurse tells me my urine test was negative. I have such a knot in my stomach now. Like am I really not?