A trip to florida with 4 kids (of any age) is overwhelming to me...I am in awe that you are still able to type
But, I do know that sometimes we get that overwhelming feeling when things go off our normal routine.
I would recommend giving yourself a normal(normal meaning somewhat normal) week or two, and if you still feel pulled and strentched beyond your limitations, by all means contact the SW.
Perhaps, call the SW, to set up a respite evening?
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although someone breaks your heart,
you can still love them with all the little pieces