Hello Sparkling You are right, houses can represent self, and as you are not comfortable in this house, it could be suggested that you have recently been uncomfortable with some part of yourself or life.
This garden seems to represent some part of yourself which is 'flowering'/growing, perhaps a part of self which you must look outside of your 'old' self for (leave old house) in order to cultivate ... which leads us to the tree.
Trees can also symbolize self, often reflecting your state of health either physically or psychologically. In this case it seems that we may be dealing more with your psychological state as you are feeling uplifted, and you also associate the sensation with your stomach (center of feeling).
Overall, the dream could be suggesting that you have recently been feeling uncomfortable with yourself or with some situation in your life, perhaps involving others, and you are looking to move away from this part of self or situation into something more gratifying or growth oriented. The dream seems to suggest that as you make this move you will be 'uplifted' emotionally/psychologically, and discover a 'budding' aspect of yourself (budding tree), one which may require "up and down" feelings, but which is awaiting your next move.
How does this sound? Make any sense?
Walk in Peace