13 DPO BFN and no AF! Confused!!

Been testing nearly every day since 7DPO, BFN on all tests.

I started having pelvic pain, food adversions, nausea, migraines and heart burn which i rarely get BUT experienced when pregnant with my son.

Had light spotting when i went to the toilet last night.

No bloating all day and little pelvic pain here and there throughout.

No period.

Then this afternoon when i went for a pee, i had a small amount of sticky CM.

Again no show of AF.

Tomorrow is when AF is meant to make an appearence accoring to glow.

But clue dates AF was meant to appear yesterday.

So confused.

I dont know if its implantation spotting or my body is having a moment.