HELP ASAP PLEASE NEED COMPUTER PEOPLE?

omigosh im the dumest person ever i wanted to reformatt my computer so i asked on this website how can i re formatt without loosing things i want someone said you can save it on a disc... people really need to be more discriptive... so looking through the stuff that came with my computer i found a disk that saidsystem recovery dvd so i figured oh i gues thats what i save it too... did i mention i know nothing about computers... so i put that in nd ended up re formatting it so is there any way i can get it back i had all my stuff on there school work games etc damnit please tell me there is something i can do