At first I thought I had a bad memory card, but now after the third one that has gone bad I've decided that there is something wrong with my camera

It is constantly corrupting my cards. I've now lost 3 different 1g Sandisk cards - I shoot RAW and can usually take between 15 - 25 pictures before I get a data error and loose all that I've already taken - then I can no longer format the card through the camera or on my computer.

I'm about to throw my camera

I was told to try and download updates ? But I can't find any - maybe I'm just crazy. I'm in a bit of a time crunch here as I'm scheduled to be induced with my first baby on the 15th and well, I'd kinda enjoy having a camera

Any thoughts????? Suggestions???