Suggest Treatment For Loss Of Memory Along With Mood Swings

hello, i am a 30 year old male . I have a habit of forgetting things. When i go outside I leave my things somewhere and i keep searching for it. I often get stressed and worried about my career and after sometime i feel happy, i.e. mood fluctuations. My decision making skill is very poor.I often forget information required at that time and then i can remember them later. I panic in exams. i simply ask silly questions ,only to realise it later that the answer was a commonsense thing. I forget names often of my friends just for an instant and someone has to remind the name. I feel sleepy many a times and generally like to stay in my room. Also i need to study a chapter many a times in order to remember. i am also slow while doing things, my friend tells me that.I make mistakes many times in doing simple problems. Are these symtoms of dementia ?