I went through the exact same thing but with a different diagnosis. My first colonoscopy was at 47 - my mom had been diagnosed with colon cancer - and there were lots of polyps. I went back a year later and there were twice as many polyps; six months later, even more polyps and I was diagnosed with AFAP, attenuated familial adenomatous polyposis, a genetic disease which carries a 100% chance of developing colon cancer. My only real option was a subtotal colectomy which I had in 2007. I have an annual sigmoidoscopy and there’s always a polyp or two in the remaining 9cms of rectum. I developed SIBO in 2017 so I have to be careful with my diet. I’m 73 now, still working, and since my diagnosis and surgery, I’ve done everything I’ve wanted to do, including a three week safari in Africa. Constant and consistent monitoring is the key for me - I go to Mayo in Jacksonville every spring for my sigmoidoscopy and every third year get additional tests (AFAP increases risks for other cancers too).