Headaches can be caused by stress, you might just have migraines. There are signs to a brain hemorrhage that come beforehand like: blanking out, memory loss, pain, sudden severe headache, seizures with no previous history of seizures.Weakness in both arms or legs. Nausea or vomiting.Decreased alertness; lethargy.Changes in vision.Tingling or numbness.Difficulty speaking or understanding speech.