Talk to your doctor
i have an irregular periods, what am i supposed to do to make it normal?
Talk to your doctor, I had irregular periods when I was younger and I was diagnosed with Poly Cystic Ovarian Syndrome, they can treat that by putting you on the contraceptive pill.
Sorry, this is out of your control. Get a calendar and start keeping track of when you start and stop. You might be able to see if you are somewhat regular (such as your period coming every 34 days instead of every 28 days).