down in the doldrums
1. Depressed or in low spirits; lethargic, sluggish, or lacking energy. I've been down in the doldrums ever since my grandfather died last month. I haven't really felt like going out and seeing friends lately. I'm just down in the doldrums a bit, I suppose.
2. In a state of stagnation; lacking activity or progress. The economy, down in the doldrums for the past several years, finally began to pick up over the last two months. The company has been down in the doldrums ever since they replaced their CEO.