Ear pain, plugged ears, headaches and sores lasting over a month

I have been getting canker sores my whole life, so about 2 months ago I got some sores in my mouth and on my tongue. I chopped it up to being either canker sores or because I ate cereal like captain crunch and it cut my gums up. Happens to me a lot really. Anyways I have been brushing my teeth everyday and gargling with hydrogen peroxide and warm salt water cause in the past it always cured the cankers. Well here we are almost two months now and they are still there and more have appeared. I have noticed that when I brush my tongue it is painful and it looks like I have ulcers on the top and side of my tongue, right behind my bottom front two teeth and my lips. My tongue is a little swollen. Now I have also been getting really bad headaches everyday now for the past month which I never had a headache problem before. My ears have felt plugged like I changed my altitude or I have fluid in them. I swim with my kids ALOT so I was thinking maybe swimmers ear. I had severe ear pain the other day so I poured some rubbing alcohol and hydrogen peroxide in my ear and it took the pain away but they still feel clogged. And I just noticed on my right side of my neck under my ear there is a lump. I was diagnosed with HPV a few years ago. Could this be mouth cancer and neck cancer, or is it possible to get cold sores in my mouth, but if it’s just cold sores then why is my ear ache and feel clogged, why is my head hurting all the time, and what’s up with the swollen