It could be cysts, polyps, fibroids. If the pain worsens and you have a fever, nausea, definately go to the ER. Have they tested for STD's? Done a CT Scan? Not just Xrays or Ultrasound...
I had simular symptoms and it progressed rapidly to the point I was hospitalized and it turned out that my uterous, etc had become necrotic. With the pain on the Left... it could be a deflection of something actually happening on the right.
Hi there and welcome. Well, no. I haven't experienced that and am sorry that you are. Things that I've read are associated with belly button pain are problems with the appendix. Have you checked into that? Also, cystitis or urinary tract infections left untreated that go to the kidneys can also cause this type of pain. Hernias can also cause belly button pain. Digestive issues. In truth, I'm glad you are seeing an ob/gyn and I'd be a squeaky wheel until you find some answers. I'd consider also going to a gastroenterologist to explore this pain. good luck