What Are The Odds?

Not sure. If you think it is a normal period then you might not be pregnant and the issue was an irregular period because of hormonal imbalance. Take blood pregnancy test to rule out any doubt in your mind. If it will not be pregnancy then you should take care of your nutrition and bridge your nutritional gaps.  

Take a test, if your not pregnant, then it can be a bunch of things last summer I missed my period from june till september I really thought I was pregnant so I kept taking tests and they came up no, so I went to my doctors and he said it could be from hormonal imbalances, diet, depression, exercise, stress you name it, it wasn't uncommon he told me he ended up giving me a pill and i got my period with in 3 weeks, I was so shocked that I went that long with out it. Hope this helps.

Sometimes the symptoms of being pregnant can be symptoms of a period to come due to hormonal imbalances.  Periods can also show up 3 months late.  Sort of the same thing happened to me.  Sometimes when you think about it or worry about being pregnant as well, it can make your period later.