Are your shoes pinching you? You probably need to do two things. Take them off. Then replace them with a more comfortable pair. Best do it in that order, as trying to walk while wearing two pairs of shoes will at the very least get you some funny looks.
As with shoes, so with mood, I think. Is something bugging you? Again, take two actions. Stop doing whatever it is that’s getting to you. Then replace it with something else.
For example if you’re feeling low, sitting moping with your curtains pulled can be understandable, but miserable.
So (a) open the curtains, then (b) make yourself a tea or coffee, or walk around the block.
One precursor to at least the walk though and perhaps opening the curtains too – just make sure you’re dressed.