You need a good physical exam. Probably an MRI is not going to show anything unless a physical exam shows something more than what you are describing. May consider TMJ/TMDD, meanind spasm of the ptrygoid muscles and temporalis muscle related to some silent jaw misalignment (this will commonly cause eye pain and temporal tenderness). A raging sphenoid sinus infection may cause eye pain without vision change, but would not cause a tenderness of the scalp to the touch. Physical exam and maybe some bloodwork can clear up temporal arteritis which is less common but can be serious. See a good doctor! http://AdvancedENTpc.com
Do your best to push for MRI. I had migraine, numbness or pain in left arm and head and face and was 49 when I had MRI show a cause finally (which is not an urgent matter - but at least gave me answers.). My husband on the other hand never had MRI and ended up in a serious case because we didn't know he had a serious condition.
I have learned by experience to push for tests - or some doctors will try this and that, experimenting with cures instead of finding causes (insurance is often to blame for this - not the dr)