I have been experiencing mild lower abdominal cramps that tend to go from right to left throughout the day, back pain, nausea, lightheaded ness, and flutters. The pain is generally mild it s never unbearable. It began in June about 3 weeks before my menstruation with extremely sore breast, and fatigue. After my period came all the symptoms subsided, and came back mildly (not as extreme as the first time) each month about 2 weeks before my menstruation, so I just attributed it to possibly being functional cyst. All the symptoms came back in September during ovulation time, but they did not subside after my menstruation ended about a week ago. Now I am experiencing mild abdominal cramps mostly on the right, but sometimes in the middle and on the left. Also right side lower back pain, lightheadedness and nausea. What could be causing these symptoms?