Inflamed Gums Help?!?

I have braces and i wear headgear at night causing me to breathe with my mouth open at night and that's the main reason my gums are inflamed. I have been brushing my gums and flossing them and it is working and I also use Listerine. Does anyone know how long it would take if really tried hard cleaning my gums 3 times a day so i can go to the orthodontist and they wont make any comments?