Sometimes I cant remember what I did or say?

forgetting is part and part and parcel of everyday life.we cant remmbr everything,and there s a good reason y too.our memory caches have been programmed to be selective in storing memory so as to prevent overload of tiny insignificant memories tht may not be of any use to us.what we think is significant at tht particular moment may influence this process.things tht we do not pay much attention to tends to be stored in short term memory but immediately deleted afterward,in accordance to how we perceive the memory to be important or not important.so if u wanna remmbr something,pay more attention.things tht we merely p by without interest would probably not be storred in long term memories.try looking up on how our memory works,ie,how short term memories are processed and stored permanently in our long term memories