How to know if i am having irregular periods? even if i have irregular periods does that mean i am not ovulating?

Keep a calendar: The frequency of periods varies among women but should be fairly regular and predictable. Their can be some difference in time between your periods and this still be normal. When their are big differences in your cycle you are less likely to be ovulating regularly. This does not mean that you don't ovulate at all and you could still get pregnant. Hope this helps.