Thank you so much for all your responses—I'm massively grateful for all your suggestions.
So we haven’t gone down the medication route yet, as the psychiatrist who diagnosed her doesn’t feel it’s needed for now, but it’ll be reviewed in future.
I do use verbal countdowns, and they help to a point, but we still struggle in the last part before leaving. Even if she’s dressed and ready, she often gets distracted/ needs to do something extra/ runs back upstairs etc and can’t bring everything together to actually leave on time despite how much organisation we've put in place. This is often the stage where it all breaks down as she then feels like I'm pressuring him and her anxiety escalates and then is directed at me.
She’s ok with me checking in during countdowns (like you’ve got 45, 30, 20 minutes left), but as we get closer to the time, her perception of urgency shifts. She starts to feel like I’m shouting (I'm really not - I've learnt that raising my voice just makes things 1000 times worse so I try my best to stay calm and steady) which leads to dysregulation and conflict.
I really like the idea of using alarms, but wonder how you make them effective? For those who use them how do you label them so they knows what each one means? I worry she’ll just ignore or not register them.
I know leaving her to it doesn’t work, but it’s really tough balancing support with encouraging independence. It doesn't seem to be one single thing slowing her down. It's just her perception of how much time she actually has is so distorted.
I was thinking of getting her a clock so that she can see time actually moving rather than just checking her phone for the time, though she struggles a bit with reading analogue time.
Thank you so much again to you all for sharing. Just finding it a huge struggle right now so am grateful for your support.