Migraine/Pressure Headache, Shadowy Vision, Chest Pain, Fatigue

So it all started around this time last year. I would get pretty bad tension-like headaches that would persist for weeks at a time, the worst lasting 3 months. In October 2011 it went away, and I was fine til January of this year. I woke up one day with a stiff neck/headache, and every day after that it worsened until i went to the ER feeling faint/dizzy/weak. Ever since the trip to the ER i have been experiencing a myriad of symptoms that no Doctor I see can explain. The consistent pressure/headache in my head is always present, accompanied by shadowy vision (24x7), occasional chest pain, fatigue (running up stairs causes shortness of breath), tinnitus and occasional numbness in my extremities.

X-rays, blood work, EKG were all normal. MRI revealed I have Paranasal Sinus Inflammatory Disease, but otherwise was normal. Would the sinus blockage cause all these symptoms? perhaps I am suffering from migraines + sinus infection? The symptoms seem too varied to be a specific disease/illness, but than what do I know.

Been taking a daily multi vitamin, b12, and feverfew. 27 years old, 6 ft tall 150 lbs. Was very healthy up until this. Any ideas?