Hello @Sassy-bear, welcome to the sane forums!
I really feel for you, anxiety is the worst and you are not alone with what you have said about your young grandsons crying and activity being a trigger. My own young children were triggers for my anxiety when they'd cry, or tantrum, or even just having more energy than I could keep up with. Usually I'd be unphased by it but when struggling or anxious it made things so much harder.
It sounds like you've got some really good tools in your toolbox with practising meditation, breathing exercises and listening to binaural beats. To add to this I would think what is something you can do to distract yourself during moments of heightened anxiety? For some people they like to exercise, read something, write, draw, do puzzle, a craft project etc.. Do you have a hobby or thing like this that you can focus the nervous energy towards?
