Too little, too late?

I'm about 7 days late for my cycle. It's very very rare I miss or am late for my cycle. Took like 6+ pregnancy test which two came back with a faint line. And the other said not pregnant. A piece of me want to just wait since it's just coming up on a week. Buuuut I'm scared! Lol. I have 2 kids already ... advice?