I Haven't Had A Normal Menstrual Cycle In Almost 2

I haven't had a normal menstrual cycle in almost 2 months. Last month I had a "period" that came 3 days early, was super light and only lasted 1 day. Standard Menstruation for me last 4-6 days with days 1-3 being rather heavy and getting progressively lighter. If the last episode of bleeding was in fact a period I should be starting in the next week, however, I have no normal pms symptoms. Additionally, I was using opk packs this month and I didn't ovulate. At what point should I start to worry and call the doctor? I am only 30 years old, but I want to get my cycle back on track so that I can try to conceive with my husband. Any advice helps. Thanks!