I don't think it's possible for you to change your Username.
i went to orgin.com and went to account settings. You can change your user name and password there but not your email.
this comes from ea's website
To update your email address, just contact us and select Origin as your Product, Account Management as your Category, your respective platform--if you don't know what to put here, PC is a good choice, as the Origin Client is accessible through your PC--and one of our advisors will be able to quickly help you with your change.
I didnt see that option o.o
My Girlfriend uses the sims account and doesnt like my user....so it would help to be able to change it
