@AnnS369 - It's definitely a huge struggle when you've found a way to manage it and then it gets turned upside down by a change of plans or by someone not telling you something, especially when you've been clear with them about what you need.
Given that this is the situation, though, what can you do to best prepare for it? Is there a way to take what you usually do with more notice and at least get part of it in so that you are still somewhat prepared and not too overwhelmed? Or would another form of relaxation in advance help?
If you need to talk, either beforehand or after to rehash what happened, feel free to PM me. Take care, and know that you are strong enough to keep going!