I was sick in 2013 with a nasty flu virus and i had a weird head pain from a headache that made my head twinge, it went away but now for the past year i have been getting sinus pain, i take nasal spray flonase, which my primary gave me, i've done neti pot

Sinus is only mild: Headache pain from sinus obstruction can be associated with acute sinusitis +/- allergic nasal inflammation that worsens with barometric pressure from weather changes. Such discomfort responds easily to decongestants and is rarely moderate or severe; in such cases look for other causes: neck strain, eye issues, variation of migraine or tension headaches, etc. A brain Ct or MRI may be indicated.