Maybe not the right place but worth a shot!

So this app says I Od on Jan 6th. I don’t use test to get exact O day however. My AF was due 3 days ago. All the Walmart cheapies, frer, dollar store cheapies are BFN still?!?!?! No sign of AF near. I’ve had the white creamy discharge for over a week now. Around 7 DPO I had wiped the brightest pink on TP after peeing (implantation?) but nothing in underwear or toilet. I eat non stop which is unlike me. I normally eat once a day. Randomly feeling sick. And heartburn after eating almost anything (especially chocolate milk) and so tired.

Wondering 2 things

1.) since I don’t track exactly when I O maybe I O’d later then the app says? How accurate is this app for you? Has anyone O’d late and been in this situation before?

2.) maybe chemical pregnancy? I really know nothing about it really. I thought a had a vvvfl on frer a 2 times taken around the same time. Then all BFN but I’ve also read the indents are bad on the frer so maybe that’s what I seen? Anyone have a chemical started out this way?