Hi, I hope you are doing well. I guess you can google practically all of the symptoms. But as a therapist I would rather recommend to read carefully early onset dementia symptoms myallamericancare.com/blog/2020/06/20/what-are-the-first-signs-of-early-onset-dementia/ on that trusted medical resource. I used to get help from their specialists for my granny and should admit their high qualification and modern approaches. It is never to late to find out something new. Hope it will make sense for you
You have the gene that predisposes you to dementia. Get tested if you have any doubt or concerns. I got tested (MRI, lumbar puncture, and neuropsychological evaluation) after my brother was tested and confirmed as having dementia. My father and paternal grandmother had dementia, so I was concerned and fortunately, show no symptoms.
Dementia is bad enough without having it attack early. Get to a doctor and get the blood work done to look for the gene.