I guess when you come from the future, it's hard to know what your family history is, huh? Well, when Fae blood is in your genetics, it's either super strong or just gives you a few enhanced features. My brother and I have the same basic genetic mix but where I can hear people's thoughts and create light and energy with my hands, all Jason has is the ability to charm women into bed with him.
I'm not sure how you'd go about testing for Fae blood but do you think you have any features that are special? Can you do things without even thinking about them?
Sorry I'm not much help. I only learned a little about it myself.