Emotions can have a large impact on memory, as far as I know. They provide the catalyst, in a way, in the process that forms memories. If you are depressed or otherwise not emotionally engaged, it can become much harder to form memories.

Solve emotional problems and memory may improve. (I have no idea if that applies to you, of course.)

> short term memory

Which sort of memory do you mean? Short term memory is remembering a name while you write it down, not remembering it the next day or week.