Confused! Any stories?

My period is very regular! I’m never late!! I’m 4 days late now and am still getting a BFN! Has anyone ever gotten negatives for a while after missing their period and then got their BFP and went on to have a successful and healthy pregnancy?? I would love to hear stories down in the comments!! I got a super faint line on a test yesterday, but didn’t see anything on my test this morning. So if I am, I doubt it will be a viable pregnancy, as I was 16DPO and it was so faint..I had a miscarriage earlier this year, so I’m worried this one will end in a miscarriage again IF I am because of how faint the line was yesterday, and the test was negative again today..yesterday’s test could have been a bad test too though 🤷🏻‍♀️