There are a lot of conditions that cause gi problems.
Its good your working with a gi doctor and getting a colonoscopy.
Of course we can't say what you have, but you should be okay. If it were cancer its better to find out sooner then later. My Father died of colon cancer because he didn't go soon enough.
But its probably not.
Stool tests and blood work are also very important and they can tell a lot from those tests as well.
Good luck to you.