For context I only started almost a year ago so I'm fairly new. I've been getting called in to work my local sort (5:30pm-9:00pm) then sometimes preload (3AM-8:00AM). Somedays I drive 8am-6pm then be expected to MAYBE work preload 3am the next day. So im summary I have to stay available all day and night Monday through Saturday because they want me to work every shift they're hurting on. I'm a hard worker, I never complain about anything, but working all these different shifts is taking a toll on me already. At the moment I'm holding out hope I build my seniority and only drive but currently it's unbearable. Any advice?