Okay so the other day,the following scenario happened:

Me: Alex,you broke my protractor? And didn't even think to inform me ?! My brother: Because I did,last week? You even told me it's fine. Me: Oh really? Why wouldn't I remember it in that case? My brother Whispers : You know mental hospital is just a call away.

And then we fought the whole day. But anyway,this is just one of the many occasions where I just figure out what exactly was sad in the past? It's been acting a major problem for me,like forgetting a special party,or a test's date,forgetting something that I spent 5 hours studying etc etc. I just turned 15 and note,I used to have a good emmory snce childhood so this sudden change is quite unusual..and troubling to me. What's wrong with me? Am I an idiot or there's something wrong with my routine?