When did you get a strong/dark positive?

I am 19dpo according to Glow. I have been getting positives since Sunday but they are all faint. Today's was slightly darker but not a clear, obvious positive and it usually takes two or three minutes to show up. Shouldn't they be darker at 19dpo? From what I've gathered, many women with this issue end up having a chemical pregnancy or MC
I have taken blue and pink dye tests. (Cheap blue tests and the cheap .88 cent test.) Should I try another type? Recommendations welcome.
Sorry if this is posted in the wrong place.
Thanks in advance for your honest feedback!
**I called my doctor and they want me to wait it out and take a hpt in a week then wait to come in at 8 weeks. Not knowing makes me anxious.