why am i feeling this way?

why why why? why the hell am i feeling this way now? i am simply grumbling about it right now. i was given an option right from the start but i chose to pick the least favourite of all. am i stupid? this is just so unlike me to do such a thing. no wonder i am feeling so restless the whole day. worry that i will do or say something to ruin the whole thing and anxious that my facial expressions tell it all. oh please! just stop all these from happening and let me feel relieved at the end of the day.