Vacation sounds great, but it probably won't solve the whole thing - or?
I think I understand your frustration.
But, if you don't want therapy (talking) and if you don't want to dump your family maybe there is another solution?
Something that can help you embrace whatever you are feeling, stay in the moment but not let it overwhelm you and stress you too much.
Like meditation of a kind? (preferably a rather physical kind, like Tai Chi).
You've got to do something... I believe that's what your body is trying to tell you...
That's the real beauty of life
Good luck and all the best!
------------------
Halina