I think one thing which could help is 'marginal gains' which is where you do little things which makes a big difference, such as:
Find your flatmates on Facebook. Prearrange a time when you'll call your mum/dad/best friend /whoeve. Find out how to contact the student support team, you'd be amazed how many other students are contacting them already, they will be able to help. Plan your days so you know what you'll be doing when, if you keep busy then you won't worry as much. Make a list of reasons you want to go to university, think of all the opportunities you'll have to grow as a person,this might be the hardest thing you've ever done but it will show you what you're capable of
If none of this works, just make sure you contact student support, they're there for you at every step