headaches/tingling/weakness

i am a 26 year old male, perfect condition, college athlete, the following symtoms (symptoms) have been becoming progressive over the past 2 years: tingling in my face, weakness in my arms and legs, now i have blackouts for a short time, and headaches not like a migraine that are constant...mri's and mra's of head and neck show nothing..catscan is negative just do not know what to do now help

[bride-to-be-mother-of-3]

Have you had your blood sugar levels checked?  I know the symptoms you are explaining can also be caused by low blood sugar also called hypoglycemia.  Sorry if this wasn't very helpful; just thought I would mention it to you.  ~bride-to-be-mother-of-3~