stress or Pregnant?

So I have one child and kinda know the early signs, but I didn't know if anyone had any insight on obvious signs. Im one week late, fatigued, I could sleep all day if I could, bloating, acne (something I haven't had since I was pregnant 3 years ago), more moody then usual, lower back pains and my hair is falling out more than usual..i took a pregnant test a few days before my missed period and it came back negative...could it be stress in my life or something else?

    It could be but now that you've missed your period I'd test again
    About Holly
    Birth: March 20
    On since: Jan 30, 2014
    I am a 20 year old mom with a two year old little boy who means the world to me. Even though I am no longer with his father I have found someone who has a daughter and is great with my son.