I know it's not funny, but it almost is. (Been there, done that!)
I had a situation the beginning of the year that was a little like yours. Basically, I SURE there was something wrong and that it was somehow my fault and had no idea what it was. Just that it was going to be terrible. I went through a similar process of internal debates and discussions. Ran it past a few people here too. Had a stretch of appointments having to be rescheduled for various reasons too. I finally sent him an email. I don't even remember what it said. (I'm sure it was fairly crazy.) It led to one of the best appointments ever. Turns out I was right, there WAS something "horribly wrong". It was that his wife and one of his sons was extremely sick. Like "helicopter ride except we don't think she's strong enough to make the flight" sick, in the case of his wife. And he was dealing with that, and moving his office, and the holidays, and thought he was doing a great job of compartmentalizing....... And, apparently no one else noticed anything was wrong. When we talked about it, he said that he supposes that, when you grow up feeling like your life depends on being able to read other people's feelings and the energy of a situation, you get pretty good at it, but that he didn't want me to go through something like that ever again. (Nice try!) So, we've worked on that kind of thing more and actually I feel more sure we're "on the same side" now than ever before. (Usually!) It was a train wreck at the time, but worked out to be the source of a lot of progress. I hope something similar happens for you! But, if you can, maybe you should consider sending a "Heads up, all is not well" message ahead of time, so she has a chance to prepare a little.
Hang in there & good luck!