My period has been irregular for quite a while now and i am wondering if its possible that i may be infertile?

Maybe/not. Irregular cycles will make planning pregnancy difficult. Some women with as few as 3-4 /yr go on to have several kids. Sometimes an OBGYN can place you on the pill to try to pace your cycles into a regular pattern, withdrawing them later when you want to try for pregnancy. You won't know if you have a problem until you try.

There are a number of reasons for irregular cycles. If this persist you can be evaluated to determine a number of the reasons , most that are than open to treatment. Occasionally irregular cycles are secondary to not ovulating regularly and this could reduce the likelihood of pregnancy.