I get, on average, about 5-6 periods a year. I've never really been regular. I'm 16 years old, I first got my period when I was about 12. I am a virgin. I am a healthy weight, I also am pretty active and I eat healthy for the most part. I've always been kind of worried but wasn't really sure about it, so I figured I would ask here. Should I see a doctor about this? What could this mean?