Hi Ann58, those first few weeks after diagnosis can be such an emotional rollercoaster, and a lot of people say the nights are the hardest. Be kind to yourself, you're still taking in a lot and it's completely understandable to feel overwhelmed.
While you're waiting for others to share their experiences and tips, you might find this article helpful: www.bcna.org.au/resources/emotional-wellbeing/anxiety-and-fear/
And if the anxiety and interrupted sleep keep going, it could be worth having a chat with your GP about some extra support. You're definitely not alone in feeling this way.