I can relate to this and I'm unsure if it's part of ADHD but I'm sure it contributes. Sometimes I wonder if I have a less extreme version of SDAM.
Autobiographical memory may differ greatly between individuals. Hyperthymesia, also known as hyperthymestic syndrome or highly superior autobiographical memory (HSAM), is a condition that affects an individual's autobiographical memory, essentially meaning that they cannot forget small details which otherwise would not be stored. It forms one extreme, in which a person might recall vividly almost every day of their life (usually from around the age of 10). On the other extreme is severely deficient autobiographical memory (SDAM), where a person cannot relive memories from their lives, although this does not affect other memory capabilities or general cognition.[SDAM is a severe autobiographical memory deficiency, but without amnesia.
There is no formal assessment for SDAM – this is a topic of current research. If you would like to participate, please take our survey. You may be contacted about participating in further in-depth testing.