I know it's tough for you to tell from only what I have give you. But would you say having no other symptons besides headaches is a positive sign? I mean, I wouldnt even be getting these tests if I had not passed out in the theatre.
Hi, headaches at your age are due to migraine but could be due to space occupying lesion in brain too (granuloma, tumor, cyst etc). These space occupying lesions presents with other neurological deficits like limb weakness, paralysis etc along with headaches.
Wait for report and better don’t anticipate much as frontal lobe lesions are rarely related with fainting episodes.