I have all the symptoms you mentioned including looking at the computer and near
fainting. I cannot go to malls, shops etc.,
and feel like
fainting immediately. But mine happened after a head injury (brain contusion).
I have seen many many specialists (Neurologist, Cardiologist, ENT specialists), multiple therapies, several meds etc., Doctors pretty much gave up on me.
I have been suffering for the past year and a half and I am already wits end.