(Concern) Retreatment after orthodontic correction..

I had orthodontic treatment a year ago without interproximal reduction and without extracting teeth. As a result, my teeth are slightly protruding and the midline of my front teeth is a little off. This causes me stress, and I wonder if re-orthodontic treatment could correct these issues. Also, I am curious if interproximal reduction is acceptable. I would like to know the duration as well!