In my experience, the best thing to try for isn't so much controlling them, as to achieve some sort of operating system and harmony among yourselves, in which people are expected to control themselves. Ulcers are definitely not-good-- are you getting treatment for that? It was our experience that trying to keep everyone else under wraps and repressed in here resulted in more stress than it was worth, and probably some stress-related symptoms. Once we started to talk with each other and tried to work on sharing time with each other, we got a lot less stressed-- it wasn't that all our problems were instantly solved (we had some issues that had nothing to do with being multiple), but it was definitely easier on us.

A lot of us don't get along well with 'normality' either-- the best we can do is to try to balance our own desires and interests with the level of 'normalcy' and functionality that we need to be able to maintain in the world at large in order for people to see us as responsible and trustworthy.