Colon or testicular cancer?

First let me say I am a nurse, and I have had blood work done and my CBC, CMP and D-Dimer have come back completely normal. And I do have a doctors appointment with an internist scheduled for the 28th. I have had this pressure in my lower right abdomen about 4 inches down and 4 inches to the right of my umbilicus. It sometimes has pain but not often, and sometimes the pressure is there and sometimes it is not. It will often radiate to my left and right testicle as well, again, none of this is constant, only intermittent. The pressure in the abdomen I feel almost every day, not every second of every day, just sometimes throughout, the pain is very rare, as well as the radiating to my testicles. I have been to my regular doctor whom suggested it might be gas or anxiety as she felt no palbaple masses. However, I have had gas pain and pressure before and this is not it, and I am not an anxious person, so I have since changed doctors. Does any of this suggest cancer to you? Any other ideas of what it might be?