@napapon Welcome to the forum!
Would you provide a screenshot of your sim's moodlets?
Or, you can try to over-ride the Focused mood by having your sim take a Brisk shower or, even better if you have Spa Day, a Muscle Relaxing bath soak.
If your sim owns a crystal or two, you can Enable crystals to provide an Energized buff (but not the Rose crystal).
Good luck and happy simming.