Ok, been there and done that....that is one of the reasons I am seperated now. The last fight we had was because of me assuming and reading too much into a message I saw on myspace. I got overemotional blew up threw all his clothes in the hallway and broke a glass...can you say drama queen!! LoL. Now that I look back there was alot of times that I did overreact just like you had and this caused distance between us among the other problems didn't help.
Hang in there. Go dark/dim and don't contact him unless he reaches out for you first. Give him his space. It may be a week or two but you are strong and can do it!! We will be here if you need support or to vent.