BFP???

I have suffered 1 miscarriage at 13 weeks back in April. And 4 chemicals the last 4 months. I did a lot of praying. I’ve purposely been buying cheapies, to see if it will pick up the HCG. I know first response is super sensitive. Something like it can detect as low as 6. And Walgreens can detect 50. So in my mind I’m like, of the wallgreens brand can pick up the HCG, that means it’s getting higher as it should? Is my thought process stupid or obsessive? The pink test is the dollar tree brand from 2 days ago. The white is the Walgreens brand from today. Is it getting darker? My appointment is on the 10th. The day after my birthday and I am anxious as heck. But nervous because it will be when I make “6” week. I haven’t been able to make it past the 6 week mark the last several months.