How do you like your job? I've contemplated becoming a 911 dispatcher but I change my mind when I start envisioning all the scenarios I could potentially end up handling. I'm not sure how comfortable I would be with hearing a person die over the phone or listening to someone discovering a dying person.
I had the same apprehensions before I began. But it's all up to you in the end. What you realize that death is a daily occurrence, a part of life; and that there's only so much you can do to prevent it, you stop feeling responsible and shook up about it.
Had someone hang himself on me after I had spent 15 minutes trying to talk him out of it. But in that 15 minutes, I had managed to convince him to give me his name, which we used to find his address, and we could get there in time before he died. So we saved him in the end. I did all I could, and it worked. Some other times, I'd do all I could, and it wouldn't work. What matters is that I do my tasks as best as I can. I can't control the result.