Doc, Glad you and the family were able to have some fun. It also sounds great that you and W were able to make a connection!
It sounds like you need some recovery/healing time. Don't be hard on yourself. You have never been in this position before, so you can't expect yourself to always do the right thing-- making mistakes is an essential part of the process. At the core of all knowledge is trial and error. There is no oracle here, there is just us. I'm reminded of a quote from Einstien, 'Our problems will not be solved with the same level of thinking that created them.' To me, this says we have an obligation to seek out the skills and ability to find the type of thinking(and being) that will help us solve our problems. Of course, everything we try that is different isn't necessarily the right thing. I don't know whether it seems like it or not, but it sounds like forward progress was made. I hope you can take it easy on yourself.
Forgive me if I am over stepping my bounds here, but it sounds like your daughter needs someone to talk to.