Hey crossbro, as St Francis said, "there the second worst thing in the world for one's soul, after sin, is sadness". As one post said earlier, you gotta control your emotions…sometimes it's hard. The devil will use your emotions against you, or he will try. As St Thomas Aquinas said, "If you're tired, take a bath and drink some wine."
In other words, if you're in a "funk", do something different, fun, enjoyable. It's good for the soul and as St Don Bosco always remarked about his boys, "if the boys are playing and having a good time, they usually don't sin." We all need distractions from our daily duties and worries. Don't let them get you down, strengthen/refresh yourself if need be so you can battle them at a later time.
Moderation in all things, even spiritual things! God doesn't require excessive stress to get to heaven!
God bless.