Thank you for your question. Your concerns are very common for patients interested in rhinoplasty surgery. A bulbous tip can be improved quite reliably using basic tip refining techniques. Your concerns of a "growing" nose is a common change that occurs to all of us as we age. As the nose ages, some predictable changes occur such as the nasal tip becomes less projected (closer to the face) and more under rotated (droopy tip). These changes can all be addressed but rhinoplasty surgery to rejuvenate the nose.
This is not an uncommon situation. You could have nice conservative refinement to keep your nose in context with the rest of your face. You can have significant improvement in the width and bulbousity.