If you've been trying to conceive, have regular intercourse, and it's been over a year then you could an infertility/fertility issue.
If you haven't been trying to conceive and your having unprotected sex you've been pretty lucky.
Are you trying to get pregnant...has it been over a year of regular intercourse?
You sound identical to me. I have always had irregular periods but never realized it meant I would have a fertility issue- seems obvious now but when I was 19 and 20, I didn't care about it. Around 21ish, I started seeing doctors to find out what was going on. They put me on birth control pills. I was on them for about 14 months and had regular periods. I stopped taking the pills a few months before I got married and the periods stopped too. I have seen several doctors who never had an answer until I saw an endocrinologist. He ran hormone levels on me and found that all of my hormone levels were normal but I had a timing issue- meaning the hormones weren't "firing" at the right times each month which means I wasn't ovulating. According to the doc, my pituitary gland doesn't communicate with my ovaries very well. Doctor has now put me on Clomid to get me to ovulate. Always check with a doctor but yes- it sounds like you have a fertility issue. 2nd- if you are not getting periods fairly regularly, your doctor needs to induce them. Going too long without periods increases your risk of uterine cancer and you don't want to play around with that.
My periods were regular until my divorce (stress) then retrned when I met my LIFE HUSBAND and then went away again and were very irregular for 3 years I tried to have 2 different Dr's check things out since I knew i wanted kids and they wouldnt since i hadnt tried yet .....Now Im having issues getting PG so yes you could have problems. Get the Dr's to run tests now while you are young