Why am I getting email returned to me that I NEVER sent? This mail is going to Russia.
Why am I getting missed calls in my log and on my caller id from myself with my own phone number?
Pretending to be Returned mails is a regular spammer technique. Other possibility is your account has been hacked or that your have a Virus/Trojan on your machine.
Ditto on phoney calls to yourself. Some add their own phone number to the blocked caller list.
As a minimum CHANGE YOUR EMAIL PASSWORD. If using an email client make sure to use a up to date virus scanner.
It could also be that your email address is being spoofed in the "From" field on messages being sent by spammers, causing you to receive any undeliverable bouncebacks. Email address spoofing does not require access to your account and so it would not imply that your account had been compromised. Most spoofing issues are temporary, as spammers change addresses frequently.