Ian Christie, coach, ex-Monster.com Director, Executive Search Consultant, and career expert, in his Being Bold blog has this insightful piece:
(many people have an ) assumption or feeling that there is one right
answer. One magic profession, that if it could be identified, would be the
solution to everything. So, in the absence of finding the "right answer," people
stay put. But, while they stay put, life goes on.
In my experience, some, and only some people, have a specific thing that they "find" and in which they can be happy for the rest of their lives. Some people know. Some people analyze their way to the answer. A surprising number of people stumble upon the answer.
This may be you, but if you don't know now, you should accept that fact that
there might not be just one perfect profession for you.