It happened to me. After I quit smoking back a couple years ago I developed ulcerative colitis. Was hospitalized a few times, last time I was so anemic I almost died. The people the hospital never seen levels as low as mine.
I'm on meds now and am a lot better.
So yeah, for some people it can kill them to quit. It almost killed me.
I remember when you went into the hospital, and this story made me think of that. I am glad to hear that you are doing better, I enjoy your posts.