The loss of a loved one in death is very difficult to handle. One thing that has always comforted me during such a time is the hope for the dead mentioned at Acts 24:15. Also the fact that one day "death will be no more" at Revelation 21:3,4. This is a promise that Jehovah God will fulfill in the near future. Please accept my sincere condolences.
I am so very sorry for you for the loss of your Mother. She is surely in Heaven now, watching over you. You were not only Mother and Daughter but also Best Friends, and that’s rare! I know how much you will miss her, but please remember that God thinks you had her long enough and He wants her back home with Him now.
Take good care of yourself, she would want you to!
My Prayers are with You and Henry.