The problem with irregular periods is that there is a possability that you arent ovulating normally I would talk to a gyno about it

How old are you?Are you on the pill? I used to miss periods alot when I was younger and the thought of not being able to have children used to worry me as well. But just because you are irregular and miss some periods does not mean your infertile. But if this really does worry you do as lilypad says and go see sum1 they may be able to put your mind at rest. Good luck!