If you are having irregular periods, and I presume that you have been logging your menstrual cycles, you need to make an appointment and see your doctor.
There are many reasons for having irregular periods. This could be from you not eating properly, having anaemia, having hormonal problems, having polycystic ovaries and so on. You do not say how old you are. Women over the age of around 40 can start the change of life. It is still possible to conceive, but more difficult.
Make the appointment to see your doctor to get blood tests done and no doubt the doctor may send your for an ultrasound scan.
Hi there. Welcome. Well, having an irregular period will make conception more difficult, for sure. But it doesn't mean you can't conceive. Do you have any idea WHY you are irregular? PCOS, hormonal issue? Have you talked to a doctor about this? Do you track your period? Is your cycle long but follows a pattern where you have a period 'around' the same time each cycle? How many days is your average cycle?