You should be able to revise the nostril sills for a smoother border. The shape of the nostril openings themselves would not be a lot rounder and it may well have too make negative tradeoffs to even attempt to make them "rounder".
anonguy2013, I prefer not to do alar rim surgery at the time of the rhinoplasty but that is water under the bridge and not all plastic specialists agree with this approach. YOu will simply need to go back to your MD and get this revised. I would wait a minimum of 6 months. Good luck!
Sounds like you have waited the right amount of time.
You should voice your concerns to your rhinoplasty surgeon.
If you are not happy with the answer he gives you, try talking to one or two rhinoplasty surgeons to get their take on the situation.