Pregnant???????????????????

had just finished my first cycle of the birth control pill.. I had on day 5 of my pill free week. and got my period the very next day.. I was a bit paranoid as had only bn on the pill for a month so i took the morning after pill 26 hours after .. what do you think chances of pregnancy are.. im freaking out.. This all happened on Dec 10th and i started my new pill pack on Dec 12th..