Possible BFP after BFN?

I tested on 9DPO and 11DPO as I had some “new” symptoms to me, and got a BFN (using the cheap tests that come with OPKs).

I typically have a 14 days long luteal phase. My period is 1 day late today. I was 100% sure it was on the way yesterday as I had pelvic pain and the breast soreness started to go away, but it didn’t show up!

I don’t have any pelvic pain today and my breasts are tender again!

I’ve been having symptoms for the past couple of days including nausea (I never get it as an AF symptom), as well as sore and tender breasts.

I’m not planning on testing again unless AF is 4-5 days late.

Has anyone tested early before and got a BFN then tested later and got a BFP? Or do I consider myself out this month?