I am really starting to get scared. I haven't had a bowel movement in 3 weeks. I take miralax everyday. I've tried 2 fleet enemas, and last night I tried magnesium citrate at my GI docs suggestion. I only went a tiny, tiny bit. I've struggled with constipation for many years, but it seems like my bowels have totally shut down. Normally the GP presents itself in severe abdominal pain, intractable vomiting, feeling full, and GERD. This is getting out of hand, and I'm scared. Do you have any suggestions? I can't tolerate fiber at all including fruits and vegetables. (I get my nutrition solely through my j-tube).