Pregnant or not?

CK

I’m on day 29 of my cycle...I am never late with periods. Ever! The last 3 months or so I was on a 26/27 day cycle so technically I’m late only by 2-3 days. But I’ve taken few pregnancy tests, all negative! Morning pee, afternoon pee & middle of the night crazy pee...nothing. We’ve been trying for another one for 3-4 months now. Is there a chance I’m pregnant? Is this just stress making my period late? What do I do next?