I'm having pain in my lower abdomen over my ovaries. Any one have any guess as to what is causing it? I have pain clear across my lower abdomen. This month I was 12 days late on my cycle, and never had the problem before. It was a very dark red. I've also gained about 8lbs within 2wks. My stomach is swollen to the point that I look to be 5 mos pregnant. I also have alot of pain in my lower back clear across. I'm not pregnant and 34 yrs old. Anyone have a clue to what I may have?

Summarized question: What could cause lower abdominal and back pain, bloating and irregular menstrual cycle?