Looking for opinions.
I had a baby in September. My mom came into town to help with the new baby and adjust. My husband was dealing with a back injury (disc herniating) and we didn’t know how bad it was until it blew out all the way. He was in a lot of pain and still working so we could save for him to be home a few weeks after the baby was born. My mom was here for less than a week and my husband and her got into a small spat about politics (I know) 
. My mom got super offended and decided to call her husband family to come and pick her up the next day. She stayed silent all day even to my son until she was picked up. A few days later my husbands back blew out the rest of the way. This happened just hours before I went into labor. I waited as long as I could with my husband then went to the hospital by myself. I called my cousin and she came down to be with me while I had the baby. The baby came and I got to go home 24 hours later. I had to take care of my husband a new born and another child while recovering from my tubes getting tied and having a baby. It was a very hard time to get through. 7 months later my moms husbands granddaughter had a baby and they went to go see the them. I live 2 hours away. My mom still has not met my baby her grand daughter and doesn’t plan to drive the 2 hours to come see us or even make plans to meet half way or something. I am ready to cut ties with her because my family doesn’t seem to matter to her. Part of me feels like I should just get over my feelings but the other part of me is very hurt because this is MY mom. This is my moms last grand child. I am my moms only child that is still alive (my brother passed away in 2015). Not to mention it is mothers day weekend. Am I over reacting?