...compounded by the disbelief that moving forward there will be no more of such memories shared nor created between my mom and I.
Trust me, more memories will be created, in time. One day, you will think of something your mother said, or did, or gave you, that did not 'register' in your brain at the time. Or perhaps, it registered but you didn't fully comprehend it. With new understanding, these things will suddenly make sense, will solidify in your mind, and will become new memories. It will happen, just be patient. 🙂