What Causes Light Vaginal Bleeding With Abdominal Swelling?

I have abdominal swelling, duration about 2 weeks. Stress incontinence, and had one week of vaginal light bleeding. Virtually no pain, just uncomfortable from the bloating. I'm very concerned about ovarian cancer and the toxic fluid (ascites). I am 56, 5 ft. 2 in. and weight about 115.