Is my nose disproportionate to my face? (photo)

From your photos, you appear to be a good candidate for rhinoplasty to decrease the bump, bring the nose in a bit, and refine the tip. Then it should blend much nicer with your other good facial features. Be sure to see a rhinoplasty specialist for consultation, but a well performed surgery should give you a very natural result.

Click on the "Learn more" link, just below my response, or go here:
FacialSurgery.com/RealSelf/RealSelf_Skylarann.html
I made a couple of computer morphs of your nose, and animations of the morphs, to show the changes that are possible for your nose in truly expert hands.
Mostly, I brought the tip back closer to your face. I lowered and smoothed the little bumps on the bridge. You'll see that typically, when the tip comes back toward the face, the upper lip relaxes a bit, and the upper lip doesn't pull forward onto the nose any more. From the frontal view, I tried to narrow the tip and elevated where it seems to droop. The woman in the short video with this post had her nose brought back closer to her face.
You should understand that the changes I demonstrated in the morph require advanced techniques, techniques that most plastic surgeons cannot handle.  Be sure to read the section in the "Learn more" link on how to stay out of trouble while searching for a rhinoplasty surgeon. You should only have surgery if you are able to make yourself very confident in your surgeon's skills. Read that page very carefully. Most plastic surgeons are quite poor at this operation, and I believe my advice will go a long way toward keeping you safe.
I'd love to hear what you think of the morphs. Did they seem to address your main concerns?
Your nose is also a good example of why computer imaging is mandatory in rhinoplasty. You need to know exactly what the surgeon is planning to accomplish -- what features he thinks he can change, and by how much he thinks he can change them. When you see his goals, you'll know whether he has an eye for an attractive nose, and whether he shares your opinion of what constitutes an attractive nose. You'll also know whether the changes he proposes are enough to be meaningful to you, and whether he understands your wishes enough to address all of your priorities. But remember, you're not hiring him for his skills with the computer. The doctor must then show you his before and after photos to prove that he can actually accomplish what he draws on the computer.
In your case in particular, you need to find a surgeon who understands all of the issues I mentioned, and how they fit together, and who can actually accomplish them in surgery. 

Thanks for the question. Based on your photos a rhinoplasty will enhance your facial features and will make you feel more comfortable with your look. I recommend you a board certified plastic surgeon for excellent results. Kind regards