Hi Bellwether. My Mom had ovarian cancer. They call it the silent killer because there are very few symptoms. The biggest symptom my mom had was bloating. Her organs were "weeping" and fluid built up in her abdomen. Her stomach was super bloated, almost looking like a pregnant stomach. She also had a weird taste in her mouth (from the fluids caused by bloating). She was stage 3c at that point. The symptoms you are describing don't sound at all like ovarian cancer.
The other posters are correct, ovarian cancer is very rare. And remember even if you did (which you don't) worrying about it doesn't change anything. Can you try a distraction? Are you on medication for your anxiety?