We get used to the craziness and then a vehicle breaks down, the hot water heater malfunctions or we get sick. It really doesn't take too much because we run on overload. For me personally it can mean the emotions go toward that downward spiral. Even though there are some strategies that I've learned to use to help prevent me from bottoming out - it is a difficult fight and each step "back up" takes every bit of energy that can be mustered.
In times like these I think of David and of one scripture in particular: David encouraged himself in the Lord. (1 Samuel 30:6) And like the caregiver, he had to -- no one else was around! David had been anointed king but had instead faced a multitude of troubles. He had a lot on his plate at this time since his own had rejected him, he was running from Saul, had joined in with "the enemy" (Philistines), and they didn't trust him to fight with them. THEN the Amalekites came in and tore up Ziklag and took all the women and children. David was just a little bit upset. Like the overloaded caregiver, he already had enough on his plate. But he stopped the downward spiral and encouraged himself in the Lord.
If my sources are correct, David wrote Psalm 16 while facing the struggle at Ziklag. He starts out with a prayer for God to preserve him and then declares that he will trust the Lord. I'd say that's a great place to start each day. He says things like: