i spotted the 28th of oct for three days it was very light almost none at all for the last weeks i have been throwing up and i have been very dizzy , i have all the symptoms of being pergnant and everyone thinks i am ... i have had one postive test and two negitive .. i called the doctor and they said wait 6 weeks after spotting til they can test for me being pergnant ... some days i am sicker than others .......can i be pregnant ??