I know have anxiety but can how can the physical

Patient: I know have anxiety but can how can the physical symptoms seem so real:( I’m a generally healthy 19 yr old male and I’ve never been diagnosed with any other health conditions. But somehow weird sensations in my heart and twitches under my rib cage are frightening me! My breathing is abnormal and I know these are symptoms anxiety and mine is severe at the moment, but I can help but think something terrible is going to happen to me. I’m in a constant state of worry.

Doctor: