Most of my life I have had inconsistent cycles. I noticed that my periods would stop for months at a time when I gained a lot of weight. When I started losing weight, my cycles would become normal again.
Taking birth control pills helped, but then I gained 60 pounds in 90 days. And still have trouble getting the weight back off and it's been over a decade ago since I have taken birth control pills.
However, a couple of years ago, my cycle started and didn't stop for over 3 months. I had consistent heavy bleeding every day...ugh!
My doctor diagnosed me with Endo and I had laproscopy (misspelled...sorry) done. The procedure made my cycles regular again, but I still have the endo pain.
The only option my doctor gave me for ending the pain is have a hysterectomy, but I'm trying homeopathic remedies...
The inconsistency of my periods mainly affected my ability to have children. After I had my second daughter, I wasn't concerned about it any longer.
Hope this helps.