I'm 30 years old and I'm missing 2 months of my period. Previously, before 2 years I had missed 1 month of my period, but now, in August I had last period, after that,till now, October 2012, I missed my 2 periods. Why it's happening?

Could you be pregnant?

Regardless, you should probably see your doctor to find out what is going on, as there are a lot of things that can cause a missed period.