Can I get pregnant during my week off?

Serena

I've been on the pill for 3 packs straight now, no period. I am switching pills for my next pack to a higher dose, but I'm only going to take 3 days of it and then go off to get my period, and then continue taking them.

My period usually takes 4 days to come once I get off the pill - can I get pregnant in those 4 days?