50 year old female. For the last 2 cycles, 2 to 3 days prior to start of cycle (all normal) sudden onset of nausea , lightheaded, heart racing, anxiety , headache, abnormal burping, alternating between hot and cold which lasts about day and half. Today, day 10 of cycle experienced sudden onset of severe mentrual type abdominal pain which lasted 3 hours. Helped resting heating pad on abdomen. Should I be concerned about this or are these all normal things related to start of menopause?