I'm 46 and my period this year is acting weird, sometimes i get it twice in a month, sometimes every 2 or 3 months, sometimes normal, sometimes just last 2 days and very little? can it be menopause? what else can be the cause?

At age 46 and actually even earlier, ovulation is more difficult to achieve as increased stimulation of remaining eggs is necessary to evoke mature follicles and ovulation, making irregular delays in onset of true menstruation. The result is continued estrogen stimulation of endometrial lining , which breaks down and causes indeterminate amounts of bleeding over time.