I definitely experience something similar -- sometimes the only thing that seems to make me feel better is to *go ahead and skip* a band rehearsal, meeting, planned dinner out, etc. Feels very liberating. Do you have a good track record there, and can you allow yourself to miss an occasional one? That's what I do sometimes (and then the rest of the month or whatever is easier to handle too -- I can tell myself "You're already at your quota of excused absences, so this time you have to attend.")
Maybe this is bad advice for you, sorry, but I just noticed that sometimes it REALLY makes me feel better to take a breather from all the commitments. Hope this helps.