1 week later update: I received an occipital nerve block which contained lidocaine and dexamethasone (corticosteroid) from the pain management neurologist team at Stanford. The block offered me two full days of relief. Headaches came back on day 3 at my regular pain levels and frequency , they said it could take up to 7 days for the steroids to fully "kick in", but I'm not too hopeful at this point.