Do I have a pride issue?

I would like some advice. I'm 26 and a full time substitute. I have a B.A. in history and am planning on finishing my certification to teach. It has taken me a little longer to get where I am due to a military commitment and being unsure of what career I belong in. While substituting, I'm often around people in their early 20's who are already teachers, and some who have their masters. My wife is younger than me, is a teacher, and has her masters degree. I feel embarred that I am so behind and I am not even sure teaching is for me. I'm afraid of getting into a career in my 30's and being subbordinant to people ten years younger than me. I feel ashamed that I am not taking care of my wife and she is superior in both her financial and career status. Recently, I have become severly depressed and feel I need help.