am I pregnant?! 😭

I last had sex with my boyfriend about a week and a half ago and I did a test the day before my period was due and when I looked it was one line but it was really blurry for some reason so I've left it on the side for the night and I came home this morning and a really faint line has shown and idk if this is just cos I've left it out for the night which has messed up the results or anything, I'm 16 and my family is so strict about stuff like this 😭