Hi,
There are chances of repeated TIAs and Strokes. Please go for a
CT scan immediately to know the cause
of headache. It may be a blood clot. Please consult a cardiologist and neurologist as soon as possible to go through all the investigations like Computerized tomography(CT scan), MRI scan, MRA (magnetic resonance angiogram), Computerized tomography with angiography, Conventional angiogram, Carotid Doppler ultrasound, Heart tests and Blood tests to detect inflammation of the arteries.