First Timer

According to the app, I ovulated on the 21st, BD on 18th. I'm not 12 dpo. Af due in 2 days.

This morning I woke up around 6 and legitimately felt like I needed to puke. Luckily, I didnt, but this is not a normal PMS symptom for me. My stomach has felt unsettled all day, though I am eating fine.

Probably TMI, but we also BD today and he said it felt different up there?

I took another test today, BFN.

Does it sound like I just need to wait longer or am I just symptom spotting? Has anyone gotten a BFN at 12 dpo and gotten a positive later?