When it hemorrhages, a person may experience sudden and severe headache, nausea, vomiting, stiff neck, usually the worst headache of life. The
CT scan showing blood in the ventricle could be a ruptured
aneurysm, hence the doctors want to do an angiogram.
The migraine headache is a possibility if the aneurysm is ruled out.
The delusions could be part of delusional disorder like bipolar disease or schizophrenia. Resurgence of panic attack is a possibility.