Overdue, negative test

Hi everyone!
I've been off the pill for about 4 months now, and up until now, I've had a ton of symptoms every month during my ovulation and after. I constantly thought I might be pregnant, but then my period would arrive right on time or even a day early.
This month, though, I've barely felt anything.. just a bit of breast tenderness now and then, but nothing more. I'm officially 1 day late today and feel absolutely nothing.
I did an Action early test last night, but it was completely negative.
What would you guys do? It feels so weird because I don't have any symptoms at all.