should my tests be darker by now?

I got my first faint positive on April 28th. And i’ve been testing periodically since then and i’m still getting faints. I ovulated either on the 15th, 17th or the 21st and I believe it was the 21st now because the faint positive was barely there at all. I took a dollar tree test on the 3rd of May and it was also faint but dark enough to see clearly and I just took a clinical gaurd test a few minutes ago and it’s there but just barely and I’m scared I’m having another chemical. I’d be 3 weeks from my LMP and either 2 weeks 6 days, 2 weeks 4 days or exactly 2 weeks from conception and I just need someone to give opinions or insight on how long it took them to get a darker test. I mean I know I’m pregnant just from how my body feels and I’m not cramping or anything like I was with my last chemical and none of my symptoms have went away I’ve been throwing up like crazy. I’m just scared the tests won’t progress.