I hate to tell you this Kiity, but it sounds like the photos were lost for good.

I would suggest to try as many image recovery software programs as possible, if you google "image recovery" you'll get plenty of hits, including free downloadable versions.

Also, don't do anything with the damaged memory card, other than what is instructed by the software. The more the memory is toyed with, the less chance of a succesful recovery.

To prevent this issue from happening again in the future, here are a few tips:

#1. Always format the memory card after downloading/backing-up. (Format in-camera, not with a computer).
#2. Carry at least two medium-capacity cards, so in case one fails, you still have images in the other.
#3. Be wary of static electricity, moisture, and extreme temperatures.
#4. Make sure the gold contacts are clean.
#5. Always treat the memory card gently, and carefully insert it into the devices.