@tintin,
I was told I had a vocation, that is, that I had a calling to be a catholic nun. I considered it, as it was one way to get to be an md, as a missionary. The trouble was, I didn't want to be a missionary.
We were taught that there were three vocations for us students in my girls' high school.
We could be called to be a nun.
We could be called to be married.
We could be called to be a single woman in the world.
So, to me, clearly the word 'vocation' means calling.
I picked the last, since back then, women had trouble getting into medical school as they were expected to drop out to bear a family.
I since became accredited in three fields of endeavor, and other people in those fields would consider me as a colleague - that is, a peer, with equivalent educational background.
Now, I would say, if anyone tells you that you have a vocation, run very fast.