Headache & Colloid cyst

[CyndiLS]

I've had daily sometimes severe headaches, not relieved by standard Tylenol, Ibuprofen, Tramadol, even Toradol injection. They start when I wake up, lessen when I stand or sit upright, made worse by activity, leaning my head foreword. If I lay down flat with ice pack on my forehead I get significant relief until I get up. I finally relented and saw my doctor who ordered CT scan. Note from radiology "normal findings, incidental Colliod cyst". Per doctor note, " not the cause of headache". Doctor did however order MRI due to previous history of brain MRI showing bone marrow changes (reconversion). My question is how can finding this cyst be "incidental" when the CT was clearly done for the headaches? And how can it be considered not the cause of my headaches when the main symptom of these cyst is headache? My other symptoms are nausea, vomiting, double vision, loss of coordination during the intense headaches.