Cycle Day 32, No period

I was supposed to start on Sunday, I ALWAYS start on a Sunday, but there have been times where I've started a day or two later, so I didn't panic immediately... Now it's Wednesday night and still nothing, Day 32 of my cycle, my periods are usually 5 days long so if I started on time it would have ended tomorrow, so if I don't start tomorrow I guess I skipped my period?

I did take a test just in case a few days ago, but maybe it was too early, I didn't see anything.

When should I test again??? I've never just not gotten my period, I've always had very regular cycles.