I'm only on cycle day 9 af finished 2 days ago. Glow says I'm not meant to start testing until cycle day 12 (I have 30 day cycles) but I got this faint line so should I keep testing now? I wasn't expecting anything to come up yet but I jus wanted to test because it's my first time using them and I'm excited haha. And it's not positive until the line is as dark as or darker than the control line right?😊