Thanks for using ask a doctors service from doctor spring. I understand your problem and will try to answer to best possible. The images as described by you earlier are a medical condition known as hallucinations. These are nothing but creations of the mind, which appear to be quite real. The headache and terrible pains you experience is all due to this cause. The hallucinations are of different types namely:

a)Visual hallucination: where the patient can see things that are not real.

b)Auditory hallucination: where they hear sounds like whistling, music.

c)Olfactory hallucination: our or foul smelling odor.

d)Gustatory hallucination: perception of unpleasant taste

e)Tactile hallucination

The hallucinations can be due to various causes:

a)Delirium

b)Usage of certain drugs like marijuana, Heroine, LSD.

c)Psychiatric illness like depression, Schizophrenia.

d)Alcohol

e)Epilepsy

I can understand how frightened you are with all the happenings, but I would recommend you to consult a psychiatrist who would be able to help you with the present condition. They can get a complete physical examination and blood tests to help you with the problem. It is treatable. 

Hope this helps. If there are any further queries you can always ask me.

Thank you.