having major problem with a database, please help quickly!

[Wellington Equine Associates (Shannon)]

I think I maybe have a big "fubar" on my hands.  And pardon my ignorance 
because I don't "speak" computerese.  Yesterday I created a Table Mailing List 
database.  All was well.  Today I needed to add some more people to the list.  
That was fine.  Was also able to sort it to keep it alphabetized by last name.  
My problem started when I wanted to change the ID field to automatic.  I think 
that it accepted the change, but didn't change when I opened the table again.  
I went back into edit to change it back and somehow I deleted the ID field, 
which to me was not that big of a deal, but it moved all of my information over 
a field i.e., my "first name" was now in the Title field and all of the Title 
information was gone.  So, I went in and renamed the fields to what they were 
now showing.  When I went back to look at the table again, the information had 
shifted again and this time the first names were missing.  Each change I made 
in the field titles resulted in more missing information.  How do I get ALL of 
my info back???  I don't want to have to start all over and I did not have the 
backup copy option selected.  I have in the meantime chosen it.  Please help 
soon!  Thank you!
Shannon