i agree with everyone here...don't let your own recovery take the back burner...
time to get creative as to how to solve that...
it sounds as though a bit of money would solve the sitter issue...
is there something you could sell and raise some cash? that old campervan, gas bbq, third tv set, grandmother's china set?
what about a big yard sale, that the kids could participate in, and the money goes towards paying a babysitter?
could you cancel some sort of monthly bill...like cable tv or something and use that money for your own activities?
is there someone who loves you who would give you a loan/gift for a bit of free time?
it's not selfish to take time for yourself and get some breathing room...it's healthy.
hope you can make it happen,
naive