I got off birth control about 6 months ago. Is it normal for my period to still be very irregular? I have not had a period in almost 2 months.

Not normal. If you're not on any hormonal contraceptive and you haven't had a period for 2 months, you should see your gyn for an evaluation. You may be pregnant; and if not not, you'll need to be checked out to see why you're not having periods.