Teeth re-correction ㅠㅠ

I have a question about dentistry!
I had orthodontic treatment 10 years ago, and I am currently wearing a retainer.

I discovered that my teeth had shifted at some point, so I am undergoing partial re-orthodontic treatment again ㅠㅠ It has been about four months since I had the re-treatment.

The re-correction is going well without any issues, but I'm worried that it might shift again even after the re-correction is finished...

The cost is not cheap, and it's also difficult to live with the braces again.

I knew that if I didn't properly use the retainer after orthodontics, the teeth would shift back because of their tendency to revert.

I was really surprised because my tooth suddenly shifted even though I didn't neglect my retainer.

It really unraveled in an instant...

I really hope I don't have to recalibrate again, I'm worried.