Certainly, no one here can even begin to guess based on a photograph. You've been checked by three different medical professionals, all of which are not concerned. Certainly you can get a 4th opinion but I recommend you do so from an ENT who is experienced in oral cancer. Keep in mind that cancer is an uncontrolled growth of abnormal cells. It doesn't come and go nor does it stop once it's started. It was my experience as well as others on this forum that in 5 months, you as well as the doctors you've seen would know there was something seriously wrong.

Globus is a common symptom of anxiety and most certainly the symptoms you're experiencing are indicative of that. If you smoke, STOP! If you drink, STOP and follow up with your doctors if the symptoms persist. Ohh, and stay away from Dr. Google. Everything is cancer according to him!

Let us know how you make out

Positive thoughts and prayers

"T"