Period Problem?

Okay so like 2 years ago I was on birth control (for migraines- never been sexually active) and when I stopped taking it, my period went away for a couple months. I read online that this was normal because the hormones have to level back out in your body. But still now, 2 years later, I have a really irregular period. Sometimes I won't have a period for months. Sometimes they are extreamly light or sometimes really heavy. I had a period a month ago, it lasted 5 days and was really light. 10 days later I got my period again. It was really heavy and has lasted for 15 days and is still going. Is my period just really ireggular or should I see a doctor about this? My doctor knows from previous appointments that it is irregular but it has continued to get worse and worse.