One other thing to consider, that I rarely hear anyone talk about, is that anxiety can sometimes be a symptom of an underlying physiological condition or disease. For example, hypoglycemia-related anxiety is a common complaint.
I'm 99% anxiety free after I learned to manage my allergies and diet!
I make light of the situation now but at one point in my life I was confused and freaked out because of the symptoms you mentioned and everyone including the doctors thought it was stress. After thousands of dollars in medical all I really needed was Benedryl, a better diet and a new primary care physician.
Doctors do consider physical causes for issues like anxiety, but they’ll avoid proposing it directly to the patient in order to avoid giving them the wrong idea.
There have been several studies performed on this topic, although they tend to focus on depression. The number of cases with identifiable physical causes are in the low single digit percentages.
In other words, keep an eye out for additional symptoms that may suggest a physical ailment, but start with the most likely explanation: That the disorder is best approached as a mental health issue
It took me time to realize, that my headaches and back pain at the same time were not physical symptoms, but from the times when I was (even extremely) worried and it was hard to come to that conclusion, that they were not part of physical problems, because pain was real. So, it is more about how person is experiencing these symptoms.
However, one day I noticed I had been getting REALLY anxious for no apparent reason. I have a history with panic and anxiety and have seen a therapist for it so I was able to sort-of detach and observe it, but it was still odd that it happened the way it did. Often, the causes of panic and anxiety aren't readily apparent and will only become so days or weeks later, but this felt different in a way I can't quite explain.
I decided to get some over-the-counter salt tablets to see if that might help. It was the craziest thing. The second that tablet touched my tongue, it tasted soooo good. Not at all what I was expecting! Within about 2-3 days of taking that supplement my anxiety went away almost completely. Now, interestingly, when I take the salt tablet, it is pretty bitter and almost overwhelming. Clearly my body was in need at the time.