18 dpo 4 days late?

Hello, currently 18 dpo. Four days from my period. I took a bunch of tests from 13-15 dpo and all of them were stark white negative....using first response and dollar store.

I’m waiting two more days to retest (Friday).

Am I out? I don’t know what’s going on, I never really have a 36 day cycle that’s very long for me not really normal...

As for symptoms I don’t really have much I had some cramping, I keep thinking that I’m bleeding and check down there and nothing...

Any advice/thoughts thanks