
Hello. For The Past 4 Months Now I Have Had

Cluster headache possibly.
Detailed Answer:
Hello dear, welcome to Ask a doctor service.
I read your query and here is my advice.
According to your explanation of pain it can be cluster headache it has those frequent attacks for several times a day that last 15-60 minutes often at the same time every day.
You had a CT scan 3 years ago and it is not valid anymore because it has enough time for changes to take place, so you may need to do another CT scan or MRI.
Treatment usually consists on triptans such imitrex injection form or nasal spry zomig.
Also inhaling pure oxygen provides immediate relief.
Cluster headache may last for some months then can have remission periods for months or years.
Hope I have answered the question.
Let me know if I can assist you further.

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