I'm actually experiencing the exact same thing.
Me too but only a year. I was doing the ovulation test but could never get a positive so my dr. Told me to start taking them the day after my period ends and take them twice a day. I finally got a positive. We still aren't pregnant but we go back to the dr. In a few months for my test.
Worry not but have faith,mostly irregular periods could be caused by hormonal imbarance,had same issue of periods but when i turned to welwoan product to balance my hormones i can say am in a better position in case i would like to conceive, you can try them as well or ask your doc