periodically I have had severe intermittent abdominal cramps. Initially when it occured, I just thought it was a stomach virus.it would last maybe 24 HOURS then go away. This last year, starting in December. I have had 3-4 episodes of Very painful, deep abdominal cramps/squeezing/contraction like, that start suddenly, and occur and occur intermittently for several hours. I m starting to get really concerned that I have something serious going on. My dad has had colon cancer twice. His mom died of stomach cancer in her 40 s, his dad died of prostate cancer. My 23 year old niece died of a rare cancer 4 years ago.What are your thoughts?