Do nose jobs usually need to be tweaked later? My nose has changed since my rhinoplasty 14 years ago. (photos)

The "bunnying" that you mention might be the way the tip cartilages are a little prominent, and especially, asymmetrical. They make the tip of the nose look wide, and make it look like it hangs a bit low as well. I hope I'm seeing it the same way you are. Profile views would probably help with a nose like yours.
The tip can be made more narrow, and elevated, and probably made more symmetric, too, in a revision operation. The woman in the short video that I posted with this answer had the tip of her nose elevated and narrowed in her revision. 
Remember that rhinoplasty is an exquisitely difficult operation to get right, and you should only have surgery if you are able to make yourself very confident in your surgeon's skills. The changes I described above require advanced techniques, requiring skill that most plastic surgeons don't possess with expertise. For most noses, it's much better to not have surgery than to have inexpertly-performed surgery. Read my essay on how to stay out of trouble while selecting a rhinoplasty surgeon. For those who have had previous surgery, it also discusses how to tell whether your first surgeon should be performing your revision.
Your nose is also a perfect 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. I always email morphs to my online rhinoplasty consultations. When you see the surgeon's goals in the morphs, 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 large enough to be meaningful to you, and whether he understands your wishes enough to address all of your priorities. How would you ever get that figured out without the morphs?

Hello, thank you for your question and provided photos, A rhinoplasty procedure requires at least one year to heal then it is the final shape and do not change generally. However, some deformities might occur years later. First you need to have a detailed physical examination then discussing with your exprienced PS you can undergo a revision rhinoplasty to improve your nose for well-proportioned, natural  and beautiful.Best Regards,

Usually rhinoplasty is a one time operation and late changes don’t happen but occasionally the nose does change.  The best solution is a revision rhinoplasty but it should be straightforward.