Well... if its your email add.
uhhh... Ok lets pinpoint it one by one...

You wanted to retrieve your Pass in FS

Since you also have forgotten your password in your email you also need to retrieve it.

1. retrieve your pass in your email account.
Ex: if its yahoo. go to the login screen and go click the "Forget your ID or password?" link.

2. Follow the instructions.
(note: This is important. If you don't remember your personal detail in your email add.
Then things will be put to waste.)

3. After logging retrieving your password. Log in your email account.

4. Go to FS website.

5. Just below the login bar click the "Forgot password?" link.

6. Then fill up the necessary details.

7. Then follow the instructions written.

8. Viola!
All done...
Now, if you don't remember any of the personal details you've placed in your email account.
Then that's a big trouble.

Hope this helped