I've had stomach problems my whole life, but lately I've been alternating between diarrhea and constipation - specifically, constipation after diarrhea. It's like my body forgets what to do when it isn't a total emergency and shuts down. Yet as soon as I eat or drink something, that seems to wake it back up again. It's kind of weird, actually, and it worries me.
Since I have periods of normal bowel habits (well, as normal as I ever get!) I'm not usually worried, but right now cancer fears are eating at my brain.