Downstairs in a dream can represent your physical body while upstairs represents mental or spiritual activity.
Going downstairs is about moving your consciousness down from your head to your heart, to get in touch with your feelings. You are rationalizing too much with regard to the subject matter of the dream. Involve your heart in the decision making process. Ask yourself if you heart was fully in charge of the decision or the direction of your life, what would you be doing now?
Going downstairs can also be about your birth symbolizing your arrival on the ground.