I have a sharp pain on the bone above my right eye. Feels likeva bad bruise but not showing a bruise. Throbs constantly for days now. Is this serious?

Could be. There is a chance you might have a problem with your frontal sinus on the right side. Would need more information to tell but I would have it evaluated. If the reason is unclear based on review of symptoms and physical exam, a ct will be very useful.
Nerve. It is most likely not serious. It is likely a nerve pain that can occur there sometimes. As long as there are no blisters or a rash with it (which could indicate shingles) keep an eye on it but have it checked if it does not improve within the next week or so.