Coping with change at work

Hi all, I'm new to this forum so apologies in advance if I'm not doing something correctly! 

I've been having some troubles at work this week. I've had a new manager (temporary), and I'm really struggling to cope with this change. This was very unexpected and without any warning, which makes it much harder to deal with. I find myself crying daily as I just can't cope and adjust to this huge change (luckily I work from home Sweat smile

I told my workplace before that I need warnings to adjust to changes, and the fact that they ignored that request makes it difficult to process as well. I talked quite openly about my autism and mental health with my previous manager but I'm not comfortable to do so with my new manager yet.

I guess I'm just wondering if anyone else has had similar experiences and / or advice?