Life doesn't always, rarely for me, work out the way we plan.
Sometimes the plan is just to elaborate and complicated and sometimes it just isn't the right fit for us tomorrow. Plans are meant to guide us to a goal, and sometime the goal changes.
A specialty of being human is to be able to adapt. If you fall, pick yourself up, dust off your shoulders, spit the grit from your mouth, and with head high, continue on. Don't despair it didn't work out and just go on your merry way.
But have a goal, it keeps us moving forward and despairing the current condition.