Dear lizardlady, I hear what a wonderful influence and treasure your mom was for you each and every day. I know that I would have loved such a wonderful relationship. I know it hurts now, but you did have that relationship and sharing that and celebrating that is so very important.
IF it were me, I would either reschedule the appointments as suggested, or I would write my mom a letter about my day.
That connecting by sharing your thoughts would really help 'me' to feel I had retouched with my special parent. I don't know what is right for you. I hope you
find your way through this. Prayers.

Also, some collage, painting, photo box built, or anything as a momento for her and of her would be grand.