Suggest Remedy For A Canker Sore On My Inner Lip

I recently busted my bottom lip open, now i have a huge canker sore on it. Its not on the outside of my lip, but more on the soft inside/top of my bottom lip. You cant see it when my mouth's shut, but when i open my mouth you can notice it, if that makes sense. It's been nine days since the accident, and my canker sore is still there, but not as painful. I've tried all the home remedies, baking soda, salt, salt water, peroxide, ect. what should i do?