For 2 weeks i've had a weird tingly pressure just under my left eyebrow, it's not painful, just annoying. migrane relief tablets didn't help.

Pressure under eyebr: For how long you had this pain/pressure? The area corresponds to the ophthalmic nerve, which is a branch of the L trigeminal nerve. the distribution is along the L upper eyelid, the L forehead. Have you ever had an injury in the past? like months or years? To me sounds like a trigger point, which will require infiltration with Lidocaine and DepoMedol, This is a combination of local anesthetic a corticosteroid.