What does pelvic pain from ovarian cancer feel like? is it severe or mild?

Depends: On what stage the cancer is at. For a long time, it won't cause any pain. If you're worried about cancer, see your dr and get checked.

Can be either: Ovarian cancer may be relatively asymptomatic until advanced. Some early symptoms can be bloating, pelvic pressure, urinary frequency, difficulty eating and feeling full quickly. More advanced ovarian cancer can cause severe pelvic/ abdominal pain, shortness of breath and even formation of venous blood clots. If you are concerned at all, please see your gynecologist.