WHEN WILL I BEABLE TO EXPUNGE MY RECORD?

I HAVE A FELONY ON MY BACKGROUND FOR POSSESSION OF MARIJUANA UNDER 50GRAMS , POSSESSION OF CDS W/INTENT TO DISTRUBUTE , DISTRUBUTIONOF CDS AND CONSPIRIACY. THIS HAPPED ALMOST 10YRS AGO IN ATLANTIC CITY NEW JERSEY I WAS 19 NOW 29YRS OF AGE . AT THAT TIME WHEN THIS ALL HAPPEN I ONLY HAD MARIJUANA IN MY POSSESSION AND THE POLICE REPORT SAYS THIS ALSO SO I DONT UNDERSTAND WHY I WAS CHARGED FOR WHAT MY CODIFFENDANT HAD . ANYWAY THIS HAS COMPLETLY RUINED MY LIFE FOR THE LAST 10YRS , I HAVE A 7YR OLD DAUGHTER AND READY TO MOVE FORWARD W MY LIFE TO MAKE IT BETTER FOR HER AND PROVIDE FOR HER AND IT IS HARD NOT ABLE TO DO SO W OUT A CAREER OTHER THAN MAKING 10 DOLLARS AN HOUR I DONT WANT TO BE IN THE LOW INCOME CLASS I WOULD LIKE TO BETTER MY SELF FOR MY CHILD AND I.