Welcome to HealthcareMagic.
Long term oral contraceptive pills
are more useful than harmful.They carry a risk of clotting disorder
.In many ways it is useful.As you are having irregular periods
even on using OCP s , I advise you to visit your Gynecologist and get evaluated .Irregular periods can be due to ovarian disease , thyroid disease
or early menopause.A complete check up would rectify if any underlying disease.
If you need more information feel free to mail me.