When to check for pregnancy after missed period?

Don’t tell me I can’t be pregnant because I have two babies to prove that I can be.

Both my girls were conceived between 2-6 day’s before my period.

Last period was October 28th, I’m very regular with my periods . I had sex only twice this month and that was within 2 or 1.5 weeks of today.

It’s day 2 and no period as of yet

So when should I check?