This does indeed sound like a depression. What have you done to address it? Of course it is good you posted here--and I think you'll get some helpful responses. If I felt this way I'd first go to my PCP and get bloodwork done, thyroid checked, etc. Then I'd consider therapy and maybe medication--although I don't know if they are right for everyone. But if you trust your PCP they should be able to work on this with you. Maybe you've already done much of this? Do some things work better than others? Personally, walking in nature often helps me. I cared for my mother-in-law at the end of her life (having temporarily moved a thousand miles east) and every morning I'd take a suburban but pretty walk to a cafe and get some fancy coffee. Sometimes I'd cry or journal or just eat a nice muffin. It varies what works for all of us but I try to send a message of affection to myself when I'm caring for others. So passing that on to you and holding you in my thoughts as you are doing something so kind and important.