Oral HPV?

When I went to the dentist last week, I told him that I had ulcers on my gums. They told me to rinse the mouth out with salt water. The ulcers went away but unfortunately they have reappeared on another part of my gums. I am a little bit concerned because maybe I have HPV. I’ve been reading about oral HPV on the internet. I’m really reluctant to go to the doctor because the last time I went (about a month ago) I told him that I thought I had chlamydia because of acne-like spots on my face, and he thought I was completely hypochondriac. He took a blood test and took swabs and urine samples. I was found to be completely clean. Maybe I should go to another doctor, but maybe I should just chill out. Supposedly there is no cure to HPV and even if I have it it is pretty minor, similar to cold sores.