possibly pregnant?

So I was supposed to get my period around the end of October and usually the latest the 1st of Nov. wellllllll that hasn't happened. My boyfriend and I always always always use condoms, we try to be very smart about it, we also check them after! I have NO idea why I am this late, is this even considered very late?? Also, have any of y'all known anyone that got pregnant while using condoms?