Im 13 days late for my period. I took a pregnancy test and it said negative. But i have been feeling sick and tired. My mom didnt know she was pregnant until 3 months with me. He test came up negative for the furst 3 months. And she had a super light period. So im not quite sure what to do. I rather not go to the doctor. But if the pregnancy test said negative how will the doctor know if i am or not if it is a false negative...