Honestly, we need much more detailed information to figure out your memory card problem.
However, based on your description, you urgently want to recover your lost data back, if I understand it correctly.
Therefore, according to my experiences, you cab try a free memory card recovery tool
that has helped my friend retrieve his important contacts completely from a memory card of his Samsung phone. He says sit is really useful and easy to operate.
So, if you want to try it, you could visit: -http://blog4mark.blogspot.com/2013/01/memory-card-recovery.html
Wait your detailed information.