Tired 24/7??

I’m 19, not in college and work 30-35 hours a week. I’ll sleep 8-10 hours and wake up exhausted. I have no motivation to work out, work, or get dolled up anymore. It has been a hard year my grandma passed, I lost a baby and have been going through relationship problems. I know everyone has had a rough year, but I’m in a major rut and don’t know what to do. What can I do to feel better mentally and not be so tired?