I Am 25 And Have Been Taking The Combined Pill

I am 25 and have been taking the combined pill Rigevidon for 2 years now. During my second week I took one of my pills about 7hrs late, and during my third week I took another pill about 3hrs late. During this month I have had protected and unprotected sex with my partner however I was due my period yesterday which is always on time to the hour but I still haven't had it. Is there a risk I could be pregnant?