How to handle change at work

There has been a sudden change at work necessitating that I am moved out of my department to elsewhere in the company. I will be moving to a different team, different work and location.

I am finding it really hard and I know I am getting a bit snarky with the people around me because I am scared. It's getting to the point at times that I feel like screaming and I am sure my partner is getting fed up of me obsessing over it when I'm home

Logically I understand that we have to be flexible but I don't know how to explain to my boss that I am having trouble. If I'm honest part of me is convinced that this is just an opportunity to get rid of me. I know its not true, but it's like two voices in my head at times.

i am fully sure my coping will be to withdraw and be quiet. But that may be worse as I need to make a good impression.

Perhaps I am just saying this to get it out there and to feel like I am sharing but if anyone has any coping mechanisms they utilise I would not be averse to hearing

Thank you for listening as it were :)