That almost happened to me. I went to bartending school in 1986-87 and became a bartender for a brief period of my life. Then I went through 3 years of pre med and social science in the early nineties, became a life insurance agent in the late nineties, gave birth to four children between 1980 and 1994. But in 2005 I heard God clearer than I've ever heard HIM before.
I still think she knew somehow. Maybe it was because I had a paper route early on in my life during that same year. I had an older sister and two baby sisters but out of all four of us I was the only one that ever took up a paper route. That was my first experience with public policy.
I encourage you to seek God for the divine reason and purpose HE has created you for. I can assure you there is one. And it may not and it likely is not in the field that you are currently in. But it is never too late with God for HE will always make a way for you to complete the work that HE created you for.