It seems that the symptoms you described such as lack of regular monthly menstrual bleeding (“came only few times in life”) and regular abdominal pain, might indicate borderline condition between amenorrhea and oligomenorrhea (more towards amenorrhea).
Amenorrhea is absence of menstrual period in women of reproductive age. It could be physiological (if during childhood, menopause or pregnancy/breastfeeding) as well as pathological (if there is some pathological underlying condition). Amenorrhea is primary if menstruation cycles never started, while secondary amenorrhea is a condition when menstrual cycles started, but stopped because of some reason.
However, there are plenty of reasons that could cause amenorrhea. It is usually some kind of imbalance of sexual or thyroid hormones (such as FSH, LH, estrogens, T4, T3, TSH, etc.) which could lead into lack of ovulations (so called anovulatory cycles). Another reason for missing menstrual bleedings could be elevated prolactin level in the blood due to stress or other organic reasons. If uteral cavity is “closed” by adhesions, then there would be no chance for the uteral inner lining (endometrium) to develop and fall off every month. Moreover, PCOS (polycystic ovarian syndrome) might produce an amenorrhea as a consequence.
Whatever the reason, it is advisable that you consult with your gynecologist about the numerous reasons that might provoke a secondary amenorrhea, because an adequate treatment depends on the proper diagnose of what is causing it (the etiological treatment is the right one).