i woke up today with a sore throat and a cough so i called my dr and gave her these symptoms and she called me in a prescription for an antibiotic and a cough syrup. Shortly after I when I started drinking my morning coffee i had a burning sensation from my lower lip. Then I tried to swish it around and it was sore so i went to the bathroom and looked into my mouth. I have a white spot on the lower lip inside and it is white all around the gums at the bottom of the mouth and on one side of the top of my mouth. I also checked my tongue after researching mouth and oral cancer on the internet. I have a red bump under my tongue as well. So my first question is does it sound like cancer or just some kind of infection? Also should I follow up with my dentist or my family physician for proper diagnose?