Should I take another test?

b

My cycles run 27-28 days usually

I’m on CD 30

And late

I took a test on Saturday and it was negative

But it’s going on Wednesday and still no sign.

From my calendar I just don’t see how it’s possible ( I would of been around 12dpo Saturday id say ) so just looking for others opinions before I spend money on a test that may show in a day or so. It’s just not like me to be late at all.

No