13dpo neg test but positive symptoms ?

Day 1 of missed period, I test yesterday got a negative test. But my cervix is normal hard down and ready for period but atm it’s very soft, high and closed (I check my cervix everyday, and it’s normal clock work when period is coming).

I’m think maybe I implanted late like 11-12 dpo?

My nipples are very pointy and very dark.. with hard spots were the glands are (similar to when I was breastfeeding my first).

And have backache.. no cramping like I normal get 3 days before period and I get very bad period pains soo this isn’t normal..

I’m just venting now because I’m confused.. with the neg test and now late period (normally 33 day cycle)

I’ll prob test 5 days past missed period.. and go from there.. is anyone feeling the same ?