How to stop obsessive fears and body awareness?

Hello doctor,

I am a 25-year-old woman, and I will get straight to my problem. Last year, I developed an intense fear of death and became convinced that I had a tumor or cancer. This fear caused nightmares and extreme anxiety. I became so sensitive that any sound or word related to cancer would trigger panic. Even now, the fear persists and has worsened over time. I began experiencing frequent panic attacks and gradually became afraid of almost everything, often creating irrational fears in my mind. I felt scared all day, and my chest would become tight—a truly horrible feeling. One example of my irrational fears is that if someone had a tumor, I would become afraid of them. If that person had dimples, I would then become afraid of anyone with dimples, whether man or woman. I know these thoughts are not logical, but I cannot stop myself. The fear and panic continue.

Over time, I developed two more issues: I became overly conscious of my breathing and eye movements, and I started experiencing a constant tightness in my head—not a headache, but a pressure-like sensation around the back of my ears, temples, nose, and forehead. It lasts 24 hours a day. I feel like I am fighting it constantly, day and night. The more I become aware of it, the worse the tightness becomes.

Please help.

Thank you.