I had Septoplasty/Rhinoplasty 3 weeks ago. I know it is early, but should my nose look this asymmetrical?

It is difficult to fully evaluate someone's nose just by limited photographs. At three weeks post-rhinoplasty, swelling of the soft tissue can certainly be a temporary source of asymmetry. It takes time for the initial swelling to diminish (usually 3-6 months) and the final results won't be apparent for up to a year. Continue communicating with your plastic surgeon and let him or her know of any changes you notice. If you are still unhappy after a year, you and your plastic surgeon may decide to discuss a revision.

It's pretty swollen from what I can tell. Give it time (3-6 months) before you make a decision on it. If it needs a revision, 9-12 months is ideal.best

The key is that it is early. Certainly we would like to see everything straight and looking well, however at this point things will simply need to heal longer to know if a next step is needed.