Severe migraine took 800 mg ibuprofen every 6 hrs since yesterday nd still have migraine ?

You need evaluation: You need to see your physician. It needs to be clarified whether this is actually migraine or something else.

Migraines: Migraines are generally triggered by certain foods or food additives, poor sleep, stress, frequent use of analgesic or anti headache medications, and hormonal conditions (like thyroid disorders). Practice adequate diet and sleep pattern. Check with your md for proper therapy and treatment . Hope you feel better soon.