I Been Keeping Track Of My Periods Since July 2014-

I been keeping track of my periods since july 2014- present. according to period calculators/calendars I should've started Saturday nov 1, 2014. I still haven't started. my normal signs of an approaching period were nonexistent. been trying to conceive for almost 2 years. can this be the real thing? gassy, tired, slightly moody, irritated slightly easily, indigestion...some of my current symptoms