Chrissy,

As far as I know, a dentist does not do a biopsy - they mainly take care of your teeth. However, they should be doing an oral cancer screening at each dental visit. Some dentists have devices (ex. Velscope) that may highlight suspicious tissue or they may do a brush biopsy, but to get a correct diagnosis you need to have a biopsy done by either an oral surgeon or ENT.

Make sure the ENT you are going to has surgical experienced with oral cancer. Waiting a few weeks to see an ENT without a confirmation of cancer is typical. I receive the cancer diagnosis on a Tuesday, and was seen by an ENT that same week because the oral surgeon's staff called to schedule the appointment.