Reply to holtgrim62
I totally understand you. My ileostomy is meant to be temporary too, got it in April this year and my body is taking longer to recover from the fistule that made me have it, so I have to wait a bit more to get the reversal.
I used to feel extremely lost, but then I found spaces like this one and a reddit forum for ostomates, started reading about other's experiences to learn about similar cases to mine, and I have found great advice to manage the bag a bit better.
I still experience some anxiety when I feel my bag filling up in public, but I'm slowly starting to care less, now I dare to wear clothes where my bag hangs out (using a cover of course, I don't want to showcase my poo).
I also fear leaking in public, but I'm prepared for the scenario and that calms my anxiety. Make sure to have a small bag that you can carry with you with supplies: a couple of bags (pre-cut if it's the case), a moldable ring, a couple adhesive removing wipes.
Remember that ostomy bags are made to last, they shouldn't leak easily, and if they do, that means it's not the right product for you, and you should look for a different type of bag (flat, convex), or a different brand. When I switched to soft convex bags my bags started lasting longer, now I change bags 2-3 times a week, before that my skin was damaged from changing bags daily, and even twice a day.
I wish you the best, you're not alone, this situation can be frustrating and maddening, some days I cry just by looking at my belly, but remember that this ostomy is keeping me alive and try to focus on that. I would suggest you also try to think about it as a life saving situation, rather than an inconvenience.