Video file recovery off SDHC card

I have a Sandisk Extreme 45MB/s 32gb SDHC card which was accidentally unplugged from my Windows computer while it was initially reading the SDHC card containing the video files (reading, not copying files). I can no longer find my video files (.mts) within the card's usual subfolder. I know the files are still on the card somewhere, as the card still has 22gb of used space. I'm open for any advice, user experiences and/or software recommendations for retrieving the video files from the card. I was also wondering if the card will still be usable after or if it is forever corrupt...