How long does it stay positive for?

Laura • 1 girl & 1 boy 💕 5 losses-2008-9weeks, 2011-6 weeks, 3/24/18 5 weeks, 4/29/18 4 weeks. 7/8 weeks 9/3/18 🤰🏻pregnant- due date 06/12/19

I’ve had a positive everyday since the 22nd. The 23rd was the darkest so I’m sure that was my peak. Today it looks like it’s getting lighter. How long will i keep getting positives? And should i keep testing? We BD the past 4 days. 🤞🏼