irregular periods

Pi
I often read that if your cycles are really irregular you should see a doctor. I have a really weird period - I often skip periods for a month or two. But every time I see a doctor & tell them, they just shrug and ask me if I want to go on the pill to regulate it. Which I don't. Why do I keep reading that I need to see a doctor? I'm 24 with no kids btw/never been pregnant.