An aging face in a dream often reflects an awareness of time passing -- a quiet confrontation with mortality or a shifting self-image you haven't fully come to terms with. Seeing yourself much older can point to anxiety about what you haven't yet done, more than fear of age itself.
When the Moon and lord of the ascendant shall be impedited by the lord of the 8th, the sick person hath cause to fear. - William Lilly (1602.-1681.)