Not happy..

I should be feeling happy as I have one reponsibility down and now I can concentrate all my heart and mind on my studies and honours project. But suddenly some issues popped up that really make me not happy at all.. make me feel really cheated and disappointed.. maybe.. I am the one who has misunderstood things and expected too much.. this heat that built up in me has already burst out once but I still feel some of it remaining in me.. appear now and then in my mind.. how can I concentrate to do my report.. Argh.. so frustrating.. I just have to be more determined and force it out of my mind.. it's over so don't think so much!