Interesting responses here.
I take it your marriage was perfect, giving on both sides, good communication, no problems over the 17 years....and then the divorce bomb?
It's unfortunate that this has happened to you both.
I strongly suggest counselling that both of you can be involved in to vent some of your issues before you separate. As well...for your daughter.
Illness is difficult do deal with even with the best/stongest marriage. There are always issues, and when the crap hits, not all are equipped or capable.
q