I myself am constantly anxious about a number of things.
So I asked this question on Quora: Why are people in their late twenties anxious about figuring out their life and career? Do follow me and the question.
People came forth and shared some amazing, helpful and even personal views. Check it out here https://www.quora.com/Why-are-people-in-their-late-twenties-anxious-about-figuring-out-their-life-and-career. It will be of some help to you.
With love, Tiisetso