Life does not adhere to a linear principle. Ups and downs don’t come neatly in line nor do they give sufficient buffer for each other to fade away.
So take that walk and if you can make an overdue call all along the way, do it. Have that laugh with a friend and maybe get inspired to start a side project. The blues might come back but they will have a lesser hold.
Get comfortable with positive and negative emotions co-existing. Don’t dismiss the bad but don’t wait for it to vanish without a trace either before seeking out the good. Greet them as familiar co-habitants, one never far from the other.