How do you move on??

Had a miscarriage last year it took me years an years to finally get pregnant after being told basically my whole life it would probably never happen well low an behold the first time I was with my ex I ended up pregnant but at the time I was addicted to drugs pretty heavily once I found out I was pregnant I just cold turkey quit an a few days later started the miscarriage I was in the hospital all alone while he was out cheating on me.. I don't know how to cope with the thought that my purpose in life was taken from me 💔👼😢