I am also sorry to hear of your loss. It took me a long time to get over the passing of my father. I thought heartaches were just figurative and only existed in songs. But my heart literally ached for a long time. As the others have mentioned up-thread, it gets better day by day. It took me years to be able to see the "sunshine". But we are all different. No matter how long it takes, whether you grieve for days or years, allow yourself to grieve in a way that is best for you. Before my dad passed he told me, "I will always be with you." At first I thought he was just saying it to make me feel better. Then I realized that what he said was very true.
As long as you are alive, your mother will always be with you.
She will continue to live and exist in your thoughts, your heart and of course in your DNA. May peace be with you.