I think they said they used to have good memory. Also, part from bad memory there is distractedness and loss of words. I have all that in small scale, but I blame using benzodiazepines, cuz I really don't wanna think much of the hereditary type dementia running in my family.

But like someone said, it can be something as simple as B12 deficiency, without B12, brain cells actually start dying. I've also had worse brain functioning with low iron. I had a very short attention span and bad memory with depression but then I also had other big symptoms of depression.

I know it can be really hard going back to doctors (not just cuz you have to remember it), but because doctors sometimes are inpatient and unfriendly. :/