It's likely you overwrote some or many of the files. Recovery is done prior to formatting and using the card so getting the order wrong means you could try http://www.drivesavers.com If you hadn't formatted we have a sticky post about what to try in the CNET Storage forum.
Bob
I am sorry to interrupt your guys. But, I need your suggestions. There are lots of photos and videos that have been held on the Micro SD card of my Android phone. However, recently, I have got a "memory card raw error" and formatted this card for continuous use. But, I also want to get my lost photos and videos back. If I cannot regain all of them, part of them is all right! Do you have any suggestion for me? How can I rescue these photos and videos?

Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic