Period is 70 days late, negative tests, pain on lower right side
I feel like the pain constantly stays on my right side, and moves to the left. The pain intensity has decresed in the past few weeks, but still uncomfortable. Could I have ovarian cysts, or some kind of syndrome? My mother recently passed away from endometrial cancer and maybe that could happen to me as well. I visited the gyno in July, receiving an ultra sound that was fine and my tests came back fine. I usually have moderate acne on my face but it's been absolutely clear, no sore breasts, but my back feels like it's going to break, and headaches. I take alieve to help my headaches and use a heating pad which helps only for a while. I recently noticed I have pink stretch marks on my stomach but I'm losing weight, not gaining.
I'd appreciate any thoughts. Thank you. :)