microsoft account

I cant login to my email address, it keeps saying this email address does not exist. However, i was on the email address two days ago and now it wont let me log in. I think the problem is that when i was setting up my miscrost surface rt i had used an email address to sign in but than later removed that email address from my rt and used another one. By removing that email address off my rt i didnt think it would delete the whole account! can someone please help me recover my email address. everytime i log in it says the account does not exist. PLEASE help!