MENSTRUAL LIKE CRAMPS EVERY FEW MONTHS

Hi all.  I have been in menopause about 5 years. FOr the last 2 i get mentstrual like cramps now and again sometimes a day sometimes for 3! I have had vaginal us  vaginal us with saline and uterine biopsy all totally normal. I have read about phantom periods? Sometimes my pain is accompanied with horrible mood swings. Any thoughts??