Newly single pregnant mum advice and reassurance needed

Ok so I've been with my bd so long I don't remember how to do things alone we were engaged to be married in March 18 tried for a baby for over a year and he's just walked out on us 8 weeks pregnant for another woman ... I cant sleep I can't eat and every hour feels like forever he's saying he will be there hen the baby comes but he won't be around for the pregnancy ... When everything was meant to be picture perfect and my whole life was planned can someone please tell me how the hell im meant to do the next 7 months completely alone I moved to his home town away from all my family and friends 2 months ago so I have no one ! I live in a house he brought in his name and I've got to move out I've had to quit my job due to being so down and it's to hard I have nothing and no one how am I meant to do this now ?