Struggling

My oldest son was just sentenced to 12 years. My life has been a rollercoaster since the day he went to jail. I have tried to be the strong one to keep everyone spirits up. But have been having a hard time keeping myself from breaking. Is it ever going to get easier? How do I help him and help his siblings and his 2 kids get through this? My kids and grandkids are all I have and i feel like a big piece of my heart is missing. I don't know how much longer I can hold on with out breaking down. I am trying but I don't know what to do. Any help would be appreciated. I