Email Hacked and Identity stolen ?

Hello,
I need help. someone hacked into my computer and sent messages to everyone that I had set up a new facebook account through my gmail. I also found out that there maybe a few of the same name people like mine now on facebook and one in gmail with a dot in the middle. I can ascertain the fake ones and I think people who have been contacted from my address book may becomes victime too!!
I immediately informed both facebook and gmail and none of them have answered me or taken any action.
I am afraid my name and other information will be used by a 3rd party and don't know what to do......please help this is a serious matter.