Hi, Mandy
The OCF Website provides Treatment Guidelines on this page: http://oralcancerfoundation.org/treatment/guidelines.htm
You want to find the type of cancer you had (Oral Cavity) - you can click through the standard of care treatments recommended. Whether or not neck dissection is generally recommend seems to depend on a number of factors, including the thickness of the tumor. You may want to print out the pertinent pages and ask your doctor about it.
One of my young friends - at the time a resident in pediatric oncology - told me that there are no dumb questions regarding cancer when my husband was going through his workup for treatment. There is nothing wrong in asking your doctors about the treatment. Bring a (mean) friend or family member (or a least a list of questions) when you see your doctor next.
Best wishes!
Maria