Migrane and Forgetfulness. Please guide!

I am really worried of my mom health nowadays. She is having Migrane since years maybe like 15 + or more. Nowadays she remain very irritative having lots tension. The thing I am worried about is she started forgetting things. Latest instance is she told me she gave me keys of two wheeler when I needed to go for market but in real she never handed me any such keys. She argued with confidence. Now when I got the keys from another person saying I never gave this keys to your mother I imagined it's getting worse. This is not one or first. There are 1000's of such instances. The most common is she always forgot things like where she kept my book or earphones. It's not normal. One or two things can be forgotten but it's repeatedly happening. Please guide!