Cancer

I had a lumbar and pelvic MRI exam. I had the result today and the doctor found a 4cm cyst in my left ovary.
I am experiencing pelvic pain, urinary retention, bloating, gas pain and I can easily get full even if I only eat a little.

My husband had bloody stool last night. He told me that he doesn't have a firm bowel movement. He is always tired and has tummy aches. I want to rush him to the hospital but he refused. I'm afraid he has colon cancer because there's a history of colon cancer in his family.

What are the signs of Colon Cancer?