The left side of my cheek, upper lip, and tip of nose is slightly numb and tingly. i've seen my primary, and waiting for specialist. what could it be?

Wrong question: In neurology, the 1sr question is WHERE, not what. In this case, "where" is the maxillary division of the trigeminal nerve. THEN you go to "what" using the standard differential diagnostic algorithm: Vascular, neoplastic, compressive, inflammatory-infectious-autoimmune, nutritional, genetic, and/or metabolic-endocrine, and zebras. (Zebras are anything that doesn't fit in the other categories.)