I'm so sorry to hear of your loss. Bereavment and grief are the two hardest things, I think, in life to go through. there isn't any hard and fast rules as to what you do or how you cope, unfortunately. All I can advise is to take each day as it comes, baby steps. And cry, when you want to or when feel like it, dont bottle it up, as it will just eat you away.
I have experienced several losses in my life and you never get used to that "awful feeling" of losing someone.
There are bereavement organizations, who can help, and would recommend, if you dont have any close friends or family close by.
I hope that may be of some help.
Take care x