It’s a good decision Deanna. At this point even if my body could pull 12 hours I know mentally I wouldn’t want it. Best way to explain it to new employer is to give the current one a months notice if possible and tell the new employer that rather than impact the old company by staying on you realized the job fit wasn’t right and left ASAP to create minimal impact.

Either way you can’t stay, it will take too much of a toll. Just my .02c worth.