I’m freaking out.! BFP with my rainbow baby, but the line isn’t that dark..

I got my BFP Saturday morning. It was faint but definitely noticeable. I took a first response and the second line showed up within a minute and it was light but definitely there. I took a Walmart .88 cent test to see a line progression and it’s still light but still definitely there. I also had some light spotting mixed with my creamy cm (light red/pink) but it’s gone now....Should I worry?