There is a good chance you will get all your data back. However, it is not always possible to get 100% of lost data back. You could have permanently lost some data.
Please download the latest version of Recover My Files from
www.recovermyfiles.com. First try a "Format Recover", if this does not work, move to a "Complete Format Recover" and after this try a "Complete File Search" for specific file types.
Use the preview feature in the program to get a feel for what sort of recovery you are getting and then you can make a decision about whether you wish to purchase the program and save your files (once you enter the product activation details into the program you can save files - there is no need to re-run the data recovery search).