Advantage to getting early diagnosis?

Hi there. I am a 45 year old female. My mother had Alzheimer's and my grandma also had some form of dementia. I have always had a terrible memory and I feel like it is getting even worse as I age. Sometimes I can't quite find the word I'm looking for and it is really frustrating. I also feel like my reaction time is slower. When I answer a question at work it seems to take me longer to "retrieve" it out of my brain, KWIM? I'm not saying that I think I have Alzheimer's right now, but given my family history, what things would you all suggest I do? I haven't thought about it much honestly, but I am reading that a lot of people get it in their 50's. Thanks for any information you can give me!