I know this is going to be really hard for you, but you are doing the right thing. Your priority is you and your kids and you will come out of this the other side OK - battered and bruised, but OK.
Don't overthink the future right now, concentrate on the present. Can I be so bold as to recommend you get professional help for your D? My SD required anti depressants at the start and this may help.
M 45 W 52 SD22 S9 D8 BD 6 April 2015 Not living together 4 Dec 2015