Phone Memory Lost Data

goin to work around 10 something but emotionally not fully prepared. Erm abit sad caz my phone memory card actually cant fuction anymore. Got alots of picture, songs, messages and now all gone? Y must be now? i dint save all my assignments picture. OMG yesterday mid night it was hang for awhile thn everything gone i thought nothing caz i was sleepy that time. argh regret caz dint save in my com.