Do we have a plan?

So I was discussing this with one of my friends and would like to get more opinions on this. Do you believe that we have a plan for our life already made? Whether it be by God if you believe in him, or by something else, do you believe everything that happens was already supposed to happen? For example if you met your now husband at a party, if you didnt go to the party in the first place would he still be your husband today? Or do you think that you would have just met him somewhere else at a different time because it was already in your life plan that a higher power had for you. Kind of confusing but I guess and easy way to put it is do you believe we have a book of our life already written and we are just living it or are we writing the book as we go?