It's normal to see very old stuff when you use a disk rescue program like GetDataBack or similar, since it can get very old data back if it's not been overwritten. But are you sure the new files are nowhere to be found ? It sounds like your partition got corrupted somehow, so the disk rescue program may be your only hope. If you didn't yet, try
GetDataBack, you can download a trial version that does everything except copy the data, so if it seems to be able to get your files back you can consider buying it (if your data is worth the money). Other than that, I fear the worst.