FF says cd 35 was O day but I know it was CD 34

Took test yesterday (when AF was due) and it was negative .. ended up getting cramps and figured I’d wake up today to AF..well she didn’t show over night but my temp dropped so I figured she would show later on..

The day went on and my cramps went away (which has never happened to me before) I also spotted pink blood around 3:30pm but nothing else since! 🤷🏼‍♀️

Any thought as to what’s going on?

I’m interested to see what happens with my temp tomorrow.