Waiting on AF to show up like...

I’m on cycle day 31, normally period is here by the 29th but last month it was only 25 days. Where are you AF? I had period starting symptoms at the end of last week but then nothing. I had pink blood for about an hour after BD this weekend. I thought that was weird so I tested and pregnancy test was negative. I’ve had a teeny bit of brown spotting the last couple days. And then I was SURE I was starting today with light cramps and headache...still nothing. Ugh.