Just sad and need to vent

My grandmother took 5 of us in when we were newborns. My two brothers, my sister, and my cousin. She was single and did it mostly by herself. Our parents were alcoholics and on drugs. I have never met my biological mother and I will never be able to since she passed two years ago from drugs. I still see my dad maybe every 5 Years or so. We’re not close. Anyways, my mom was diagnosed with Alzheimer’s disease. She still knows who we are for the most part, but you can’t keep a conversation going with her. On Mother’s Day we had to move her from Kentucky to Arkansas as its getting too hard for my uncle to handle. She was so confused while packing her things. She thinks she’s only staying for a little while. She thinks we won’t visit her. The look on her face broke my heart. I am 23 years old and due in July with my first baby and I live in Michigan. It just makes me really sad to be going through this. I am now really far from her and who knows when I’ll be able to visit her again. Who knows when she will be able to visit her great grandchild. Her Alzheimer’s is getting worse and who knows how long she’ll be here with us. I wouldn’t be where I’m at if it wasn’t for this woman. I just wanted to vent. Anybody else going through this or have gone through this?