i have pretty close to the same symptoms as you... one doctor just diagnosed me with chronic sinusitis.... i have had what we thought were migraines since i was about 9 and i am 26 now... my CT scan showed that everything was fine... but xrays show that i have fluid in my sinuses that wont go away. i am now conflicted as to whether or not i have migraines or if it's been my sinuses all along. the doctor said that the symptoms for each are quite similar.
Hi, your symptoms are suggestive of migraine, in sinusitis headaches are usually not pulsating but dull and also not that severe. But, low grade fever should be investigated. This could be either due to sinus infection or something else.
Try treatment with antibiotics (amoxacillin, levofloxacin etc) along with anti histaminics, anti inflammatory drugs (ibuprofen,diclofenac etc). If no response is seen, consult neurologist for migraine therapy.