Sounds like TN to me. Probably ATN (Type 2 or Atypical) as that's what I've recently been diagnosed with and I too have the constant headache and then the attacks of sharp pain. I get that dull ache in my ear too. If you google the trigeminal nerve and have a look at the picture you will see all the branches that go off (which do go to your temple, your sinus and nostril/nose, ear and jaw).