Some time back I noticed that my vacuum cleaner was no longer picking up well. I knew that my bag in my vacuum cleaner was probably full, and I knew that was the reason my vacuum cleaner was no longer working well. For a few different reasons (none of them very good reasons) I put off changing the bag. One of those reasons was that I had no replacement bags on hand, and I needed to go to the store to purchase some new bags.
When I finally replaced the bag in my vacuum cleaner it was indeed very full. There was dirt and lint even up into the hose part of my vacuum cleaner, which I had to clean out. Before I bought and installed the new bag, I in essence was choosing to ignore the fact that a problem existed. This, however, did not erase the fact that dirt was accumulating. Hence, my vacuum cleaner was not fully functional.
The same can be true of life. Is anything clogging your life, dear caregiver? Are you allowing bitterness, impatience, or depression to clutter and clog up your life? The best way to prevent that from happening is by continual spiritual maintenance. You need to take the negative feelings which can sometimes crop up to the Lord in prayer. You also need to spend time daily in God's Word searching for His promises. You further need to find things each day for which you are thankful. Finally, trust and rest in the Lord. Thankfulness and trust are the key to joy and peace.
On a purely emotional and physical level there are also some other things you should and can do. Try very hard to get enough sleep each night. Also take at least a part of each day for reprieve and to energize yourself. Do something each day that you enjoy even if it only for a few minutes. Finally, do not engage in second guessing yourself or false guilt in regards to your care of your loved one. You are an imperfect human being, but you are doing the best that you can, Don't let your care-giving and other life circumstances clog you up emotionally, spiritually, or physically. You are too precious in God's sight to do that to yourself, dear caregiver!