Benedryl for sleep

How screwed am I?

I took benedryl night for sleep when I was pregnant, it was the only thing that helped me sleep. I would only take one pill I believe not the full dose, that was for 10 months. Then I stopped for a year or two then I’ve been taking it about 4-5 a week for the last few months maybe a year. Now hearing it can cause dementia how screwed do we think I am? I’m 29and relatively healthy, run at least 20-30 miles a week. Trying not to have a panic attack thinking I’ll have no memory in a few decades lol