If you are concerned that your oncologist is not that familiar with OC, then you need to be seen by someone who is -- whether for a second opinion or for continued treatment.
As a starting point, take a look at this list of
National Cancer Institute-designated cancer centers. With the exception of those few that do only research, all these should have a dedicated head and neck cancer clinic where the only thing they deal with, every day, is this type of cancer.
In your home state, the cancer centers at Wayne State and the University of Michigan are both on that list.
Your current doctors should welcome another opinion from people who deal with this on a daily basis. (If they don't, you need new doctors!) At the least, you may be told that what your current docs are doing is what the specialists would do; you also might hear of treatment options that your current docs are unaware of.
I wish you all the best. This is the best place around for information and support.