Could you be pregnant if your period hasn't come on time for two months?

If you've had regular periods before and suddenly cease having them then yes, you probably are pregnant and should see a doctor right after for the safety of not only your baby, but yourself. There can be different medical conditions that can cease periods such as Birth Control, Anorexia, etc. It's best to see your doctor to find out the real reason why you aren't having your period.