What should I do?

Hi guys! So basically I’m very close to my braces journey coming to an end, I just have one more tooth on the bottom that needs to move and I need to fix my bite a little and then I’ll be done. But my concern is this. As you can see in these pictures, my back teeth on the bottom don’t align with the rest of the teeth and it’s the exact same with the top arc. I’ve spoken to my orthodontist and she said that she can add the brackets for no extra charge but it will add about 6-7 months to my treatment. I don’t know what to do because I’m scared it’ll make my jaw look a bit… bigger I guess and I don’t know if I should do all of that when my teeth are nearly straight.