Talk to your doctor. Trauma and loss like you’ve experienced recently can cause chemical imbalances in your brain. Usually the outcome is the onset of depression. The doc can do blood work and can see if you need a supplement of vitamins or some other kind that can restore balance. Not sure how old you are, but your testosterone levels may have lowered and if so, can also cause low energy, depression, and other issues. Alcohol can enhance any of those problems. Don’t just throw in the towel. Sounds like you have great kids and they didn’t get that way without your influence. Go get checked out.