PLS HELP Call me crazy but I know when I implanted

Well I at least know when I had IB, it was the tiniest brown spot in my panties and was gone after. Slight cramping and dull lower back ache. I got my vvvfl def positive the next AM at 7 am. Another faint line but slightly darker the next day at 645am. But this mornings was super faint :(( getting discouraged as I don’t feel like it was diluted urine. I do, however, always get stronger lines w second morning urine.

My question is. Does anybody know if I implanted on Halloween, 10/31, when my lines should be super dark??? I’ll attach pics for reference. What HCG does FRER pick up??? Lines all there in time frame AND pink. I swear. I’ll attach pics but if you can’t see them just trust that when I upload to eve it always blurs 😭😭

Basically I’m scared I’m having a chemical. Please comment with any information:(((