{{{{{{{hugs to you}}}}}}} It sounds like depression to me. Every one of us feels this way sometime or other. You are not alone. It may also be the time of year, too, so if you have the opportunity to get out into the sunlight, please do. Sunlight helps bunches. It's good for you and good for your puppy. You both desperately need that vitamin D.
I hope you start feeling better soon.