Calm down, I'm 38. Your biggest critic is yourself and your surrounding influences. Age discrimination may be alive and kicking amongst the younger crowd who want to be with their own age group but there is still much out there that needs doing on projects where they value the experience of older devs - not that you come close to qualifying as "older". Take heart, you're not old until you let yourself be classified as such. Shun the label and get on with the work to be done.