OK, I need to just take a deep breath and stop reading into anything.
Yes, breathe. Count some deep breaths and find your center.
Two separate issues.
D14. Can you call D19 and ask her to check in on D14, then get back to you? Otherwise, call W and check in. Make it clear to D14 that you need her to respond in the future...even if it's just to say, "Dad, I'm busy and I will talk to you tomorrow" or whatever.
Party. Is it worth it? You are still pretty fragile. Can your heart handle it? IMO, I'd sit this one out. But, if you feel you NEED to show up for whatever reason, everyone here will support you.
"You know, it's times like these when I realize what a superhero I am." Tony Stark/Iron Man
“Focus on what you can do, then do it with all your heart.” Lois Wilson