I think sometimes there are no words to describe how we feel to someone else. It is like explaining the color red to a blind person. You may want to start with the way your body feels and go from there. If you feel tense then you may be anxious, if your heart is pounding then you have be afraid, but however you may really feel nothing at all. I don't know your race or gender, but that can hinder you being able to feel and express emotions as well.