If you have saved your campaign and want to go back and edit it or carry on working with it. You are able to easily conduct a search within the system to quickly find the campaign you wish to work on.
Go to the SMS section and click on SMS Campaigns and then all you have to so is type in the name of the campaign in the search bar (as shown below) and click search. You will also be able to see a list of campaigns below the search box. All you need to do is select the one you want and that campaign will load up.
More Tutorials which you may be interested in:
How to edit a SMS Campaign