What do I do? How long will I have braces for?

It does not look crooked at all to me. Just keep wearing your retainer. You are the only one that is going to notice they are not absolutely perfect. They are as perfect as they can be, and to anyone looking at your mouth, they look perfect. Unless your teeth are fake or have veneers, it is impossible to get them that exact. Your teeth look way more perfect than most people's, and I've seen a lot of teeth from working in a dental office. You should be really happy with how your teeth came out.