Hello, welcome to the forum, my you have a lot on your shoulders, I'm so glad you've found us.
Looking at what you've said, it is possible that you have an IBD like Crohns or UC, as generally a calprotectin score of that level is indicative of active inflammation, and therefore would mean IBS is less likely. With regards to the CT scan, its unfortunately not uncommon for results to take a while to come through, when I initially had my MRI I had a wait of over a month before I had any contact regarding the results, and that was with me chasing them up for a couple of weeks too. I would give it another week and then try and contact the department that did your scan as they should be able to tell you if the results have been processed and whether they've been seen by a consultant, and they should also be able to tell you who to contact in order to get the results.
In terms of whether this is good or bad news, I personally would call it a bit of both. The bad thing about IBD is that there is no cure, so this is a long haul thing, and there are certainly bad days. It can take some people a couple of years or so to find the right combination of treatments and to find what works for them in terms of lifestyle etc. The good thing is that there are treatments available which generally work well once the correct one has been found. Many people with IBD go on to lead a long and fulfilling life and manage to work, travel and have strong relationships.
I hope you get some results through soon and your transplant goes ahead in the near future. Please keep us informed and good luck.