No sign of period after changing pills?

[LeoLeah77]

My last day taking the pill is a Saturday and then I'm usually on by Wednesday. It's Wednesday now and no sign of period. No niggly pains, backache or any indication that I'm about to come on like usual. I have missed a couple pills but we use condoms anyway. One did split the other week but he hadn't.. Ya know, 'got there' yet. We realised it before and used a new condom.

Anyone else experienced a delay or missed period by changing pills?
I'm not stressing out as I'm not even a day late yet. Just curious...