As I remember Mom telling me of my conception, I came forth via a lack of action, or laziness. I have taken that theme of laziness to heart. But all in all I think I was unplanned. I was an unplanned pregnancy. Not unwanted, just, we didn't really plan, but you can and we're happy you're here kind of thing. That what I thought of when I couple sort of announced their coming child. It wasn't like they were trying to get pregnant, but it "just happened" and they are looking forward to becoming parents. Yay.
The small people, my nieces and nephew were definitely unplanned and their arrival worrisome. But now, I'm happy they are all here, regardless of who their guardians all happen to be. My sister was on birth control however, its proper administration and practice was not a top priority for her, add sex and tada, kids.
I think of all the other stuff that just happens, that isn't really planned. Some of the people I work with were not history majors, somehow they wound up working with history. We do plan for some stuff, to employed doing something is the general plan, to be a particular job title, working for a particular company or organization, not so much. In general I plan to work till I don't want to, some time after being retirement aged. I hope to continue to stay at the same place I am now, but you never know, I may get married and follow my husband, I may switch jobs due to some new interest or unforeseen thing, or health emergency may change those plans.
There is a lot I don't know. Thus, there is stuff I can't plan for. So I can only assume that all things will remain constant going in one direction, and I'll plan for that.