Faint line

So I took a pregnancy test about 2 days ago and it was a plus but the line going up and down was so faint. What do u guys think that means plus my breast and back hurt so bad. It's to the point that I can't wear a bra in the house it just makes the pain that much worse. I am not trying to be out there it la just I need advice. My nipples are getting bigger dryer and darker then they usually are and way to sensitive. Do u guys think this may a sign that my period is coming or is it one of the early signs of pregnancy? Can u guys see the faint line going up and down?