is there some specific incident beacuse of which u r feeling this way?
no it just comes up
It happens sometimes, maybe because of season or monotony in our daily routines, why don't you pick up something like a hobby or sport that would give a sense of satisfaction and relaxation.
Has anything major or minor incident happened lately has caused this? If not try to find peace by meditating or socialising safely, it could happen because we all are going through a tough time through Covid