The following suggestion is if you're using Word 2003. You might want to post
what version of Word you're using as other versions might handle tracking
changes differently.
It is possible that you have been tracking changes and you are currently
viewing the original, but your changes are still there.
To see if that's the case, from the VIEW menu select TOOLBARS and then
REVIEWING. A new toolbar appears. If the first item, a drop-down list, shows
"Original" then select "Final" instead, and your changes should be there.
You might want to accept all the changes you made. To do that, on the third
button on the toolbar click the down arrow and select "Accept all changes in
document".
You might also want to turn off track changes. To do that, from the Tools
menu click "Track changes" so that the icon is not highlighted.
If that doesn't sort you out, someone else will need to come up with some
suggestions.