Tammy: Read what Mayo has to say about what you may have;
https://www.mayoclinic.org/diseases-conditions/leukoplakia/symptoms-causes/syc-20354405

If this is what you have, it is my understanding (non-professional) that it converts to cancer in something like 10% of the cases. Have your dentist keep an eye on it for any change. If you are worried, your ENT can locate somebody who specializes in leukoplakia. Smoking in youth and present alcohol use have been identified as factors that increase risk. As to your question, I have no thoughts either way about one side or both.