Hello ngnirsalman Welcome to HCM Sudden onset unconsciousness and severe headache and eye pain may be due to a number of reasons in your age. Infection in brain either meningitis is most common thing we can think of these symptoms, sudden unconsciousness, fever, headache are seen, also neck rigidity is observed. Second possibility which can we think is it was a seizure episode, seizure may present with sudden onset blackout or unconsciousness followed by headache and confusion. Also any hemorrhage may be a possibility but its more common in elderly age. Red spots accompanying may be due to some drug reaction or may be due to fever itself. even if blood investigations are normal still go for repeat blood tests and visit a good doctor for management. Thanks Hope I cleared your doubt.