So lost and confused!

I’m currently 16 dpo, AF is 2 days late and I keep getting these super faint pregnancy tests, every day since Wednesday I can see a visible pink second line but it isn’t getting darker which makes me think if I am it’ll end in a chemical, a miscarriage or maybe I’m just crazy and seeing something that isn’t there but I have posted in the faint lines group too and people are seeing the second line there too which tells me I’m not that crazy. Has anyone had this happen and it turned out ok and you were pregnant? My husband and I have been trying on and off for about 2 years, I’ve had cramping for the last few days, today I’ve had back pain, Thursday I seriously fell asleep sitting in the recliner while my 2 year old played and I never do that!