I think that everyone has a passion, sometimes it is just buried underneath all our "other stuff" for awhile.
I don't care if you have a job, business, and/or a full time mom. If you are not doing something you love on a weekly basis, you are going to burn out soon. Do you love to sing, play racketball, sit in a quiet spot and do nothing? Do you enjoy reading, wearing red boots, cooking? WHAT???
Ask those you are closest to what you are good at. Sometimes we have a passion we don't realize we have. We are good at something and take it for granted it is a gift, talent or passion.
What did you enjoy doing as a teenager? What did you want as a career during high school? Are any of these giving you a clue?
Finding what you love is one of your first steps.