My first post - coping as a young person in a family with a history of alzheimers

Hello, I am a 24 year old woman who helps to care for my grandmother who has alzheimers. I live about 3 hours from her, my mom and grandpa are her primary care givers. I make trips to visit about once a month. I have joined this forum in hopes of finding folks to talk to about my experience as a young person who has witnessed alzheimers from a very early age. My grandmother's mom (my great grandma) passed of the disease when I was 11. I helped care for her until the end. Now, I am taking care of my grandmother who I just helped move into a care facility where her mother passed about a decade prior. I can't help but feel like I am watching history repeat itself. I am an only child and my life has been consumed by the anxiety that one day my mom and I will meet the same fate. I am wondering if anyone has experienced a similar situation in their family? Being so aware of this disease from such an early age has immensely impacted my life and caused many years of intense depression and anxiety. I know the fear will never go away but I am hoping chatting with folks who have gone through similar experiences may bring me some peace of mind. Thank you for taking the time to read :)