I started my period when I was in either year 7 or 8, so either 7 or 8 years ago now. I've often gone 4+ months without a period. Sometimes it seems like it may be starting to get more regular but then it's completely off again. I've never been on any contraception. The periods always vary in length and flow. They've never been very painful, last time (in February) I did experience some discomfort. Do I need to worry about this? Is there anything I can try and do to make them regular?