Help me if you can

I have a problem now. It seem that i can't remember things told to me. For example, a few seconds ago, my mum ask me to wipe the table. When i'm cleaning the table, my mum tell me to swep the floor. But after i clean the table, i forget all about the floor. Take note, all this only happen less than 30 seconds. What's wrong with my brain? I can't even remember what i want to post in my blog... Sigh........ help me if you can.