Hello and welcome to HcM forun,
Thank you for writing to us,
First of all,I would like to appreciate you for quitting
smoking.
Its Good to let your doctor know everything...all the signs and synptoms you have.
Makes it easier for the
dentist to provide you will the treatment.
Its never too late, next time you see your dentist kindly mention about the jaw tenderness too.
White patches on the inside of the cheeks can be either from smoking or ither factors.
In order to rule out the cause some test are required which I assume will be done when you visit your dentist next time.
Smoking is one of the biggest factor responsible for white patches and quitting smoking can reverse the condition too.
Kindly follow up with your dentist.
Take care.