Adjusting to being alone

Sam
Hi all. I'm finding it really hard to adjust to being in my house alone now my ex has moved out. We've had NC since he left yesterday morning - and all I've done is sleep and pace the house. Every time a car goes by I hope it's him coming back, realising he's made a mistake. 
My parents were supposed to come over today but they decided to spend the day with my sister and her children instead - they don't know that he has left; or that I am pregnant. I wanted to tell them today. 
I feel so so alone and just want to see him again, I feel like I'm going to be alone forever. My friends all live so far away. All I can think is that he is out having fun, enjoying life and not giving two sh*** that I'm here in our house feeling like this