(Concern) After getting braces...

It's been about three months since I finished orthodontic treatment. Overall, I'm satisfied, but the midline is a little off. Just a tiny bit! What I wanted was for the midline to be aligned... Redoing the treatment would cost money and time, right? I've also heard that the gums can become quite weak. If I do it, I might regret it, but if I don't, I might regret that too. What should I do? I'm curious about reviews from people who have undergone re-orthodontic treatment!