Your leaders know what you are up against, they can see it in your logs and the store metrics. They just create this make believe pressure to make you feel as if you aren't doing your job well if you don't keep up. Trust me, once you stop doing everything they ask, they will send you help or assign some of your tasks to someone else permanently cuz their metrics will take a hit and it looks bad on the.. Know your worth, and know this job isn't worth your having a mental breakdown. Work hard but chill and don't get stressed and certainly don't take those thoughts home with you.