Stuck in the Middle

I am a middle child, but I am not used to being in the middle. While I am usually balanced in how I do things, I am almost never in the middle. I am either Happy or Sad in some extreme, I either feel intellectual and serious or foolish and carefree. Now I feel neither. After an extreme case of anxiety leading up to my Senior Project Proposal, I expected it to go very well or horribly. I was not prepared for the middle. It went in mediocrity and so I now do not know what to do.