Download this tool and run it:
http://www.r-studio.com/The tool is free to see if you can recover the data.. if you can then buy a license so you can get your wallet back. It's handy to have to in situations like this.
You will be able to scan data beyond your file table that is still there.
It is going to take time because the data is likely going to be a rats nest after formatting. So be prepared to go through numerous unidentified folders attempting to find where your file is located if it is still there.
I don't know how you backed up your wallet if you kept your keys in a file or if you downloaded the .bin, but either way, this is your best chance at finding that specific file and then attempting to restore it.
DO THIS NOW... don't wait.. the longer you continue to run your new formatted system the more likely new data is overwriting the old.