pictures suddenly unable to view

My phone has been getting worse and worse recently. I am 14 months into a 2 year contract and totally unhappy with the reducing capability of this phone.

i have a 16gb sd card to extend the storage and have had this in since i bought the phone. i have it set up so my photos are stored on the SD card but yesterday something happened when i was trying to take a picture of my new baby boy and the screen kept freezing and a message appears saying the camera is not responding a message has been sent to HTC to work on the problem then with the option to wait or exit.

I now cannot see my photos that were saved on the sd card even when i put it into the computer to view.

i just had a baby and these are all pictures of him so i am really anxious i have lost them for good.

is there anyone who has had the same problem? is there something i can do to fix it?

i have tried transferring the photos to the phones memory but they still cant be viewed. please someone help me!