 [ Symptoms ] pain behind right eye blurriness headache sinus pain [ Disease ] in my opinion it is most probably migraine headache and to a lesser extent sinusitis a ct scan is a good diagnostic tool to rule out any other pathologies try triptan medications which include sumatriptan imitrex rizatriptan maxalt almotriptan axert naratriptan amerge zolmitriptan zomig frovatriptan frova and eletriptan relpax sleep well and drink plenty of water if no progression then you will need to see a neurologist and ct brain is needed