Morning urine isn't the only urine that can give you a correct result. Why not take it when you get up? Or just take it when you need to go to the bathroom the next time?
If you aren't due for over a week, you are testing too soon. Stop worrying about it. Test in a week or so. You'll get your real answer then! Good luck! *baby dust*
Well, don't stress, that can belate your period. Yeah, try testing again. It's possible, if you are pregnant, that you didn't have enough pregnancy hormone.
Try a pee stick first. When I was under 18 my parents had to come with me to my appointments, so I don't know if you can go to a doctor without a parent accompanying you. However, if you go to planned parenthood, you do not need parent consent.