OK, I feel ya':) I'm not gonna tell you to NOT worry as it is what we do....HA peeps, when we are about to have a med test. But, if you let the peeps here, on The AZ, help you some, hopefully, you can peg down your overall anxiety just a bit. And, when we are really jacked up, 'just a bit' of relief can be wildly wonderful:) Most peeps here have a hard time reasoning things out, at times, when it relates to their own struggles, but it is amazing how we can offer up some pretty sound advice to others in need, even when we might be struggling ourselves:) I find this fascinating, and, ultimately, there are some keys to our own 'recovery' underneath this ability, if we are able to begin to peel back some of the 'layers of fog' that our own anxiety issues can lay upon us.
Anyway, at your age and with no family history, CC would be remarkably RARE. REMARKABLY. You, likely, have IBS...so it seems from what you say. You'll know soon enough, though...I'm not your Doc:) I've have IBS for about 27ish years now. It is intermittent...comes and goes....it is good then not so good then worse and moves to bad, at times.....and comes back to good. Now that I have a 'handle' on the domination of anxiety and do not have many lifeflow interruptions from my anxiety / panic / health anxiety issues, my IBS is, overall, much better. Sure, I still have it....I still 'feel it' quite a bit....and sometimes the cramps get pretty AWFUL. But, long ago I accepted what my struggles are really caused by and I no longer fear the physical manifestations. And, reducing this fear goes sooooo far in helping reduce the prevelance and severity of my IBS, to begin with. The whole 'brain - gut' connection is incredibly powerful. We can get twisted in knots by the worry...and that 'twisting' ends up being felt in our GI system, often....like a big 'ol belly pretzel, sometimes.
You're gonna be just fine:) Then, you have to begin really working on your mental health challenges. You should be doing that already, though:) What's your plan?
Peace and Feel Well:)
P.S - Keep in mind how you feel waiting for this upcoming med test. For a person with anxiety disorder / health anxiety, the 'what ifs?' carry us into some pretty dark, yucky places in our minds. It is paramount that HA peeps move away from medical intervention after they have been given an "all clear" healthwise. Else we get stuck in the cycles of fear, where we seek out med intervention and med testing in a continued loop, seeking out that next 'fix' of reassurances. These reassurances are fleeting, at best. And, cycles of fear can be perpetuated (for lengthy periods of time, even) if we don't learn how to accept and treat the true underlying root cause of the MAJORITY of our struggles. Peace:)