The thing is, having any kind of health condition which has multiple symptoms and is bewildering or complex is naturally going to generate anxiety. Is that pathological or abnormal!?!? No. We have to stop labelling it in this way and accept that it is normal for scary things to cause anxiety. That doesn't mean that it is pleasant or desirable or that we don't need to treat it somehow - but it also doesn't mean that it's all in your head....
When I first had endometriosis, I had: A weird sensation in my bladder when urinating. A pain in the left ovary area. Lower back pain. Night sweats. A pain below my navel. I was very anxious about what was causing these pains (which I think is understandable) and there seemed to be a new one every week. From anxiety, I began to get palpitations, and runny poops - no matter what I ate, food just seemed to go through me. I struggled to keep weight on. Of course, unexplained weight loss is another scary symptom....
I had a very shit female GP who was about as empathic as a teaspoon. She said to me after my 3rd appointment, 'let's face it, the real problem here, is your anxiety, isn't it?'. I refused to see the situation in that light but she typed away on her computer and I could see her diagnosing me with generalised anxiety disorder. I've never taken any meds for anxiety because, whilst I know I do worry and get anxious, it's in response to events and things in the external world and it passes when they resolve.
I wanted to say to her - YOU try having a different incomprehensible physical pain every week, and we'll see how long it takes before YOU get anxious about it.
After my lap, I went on Cerazette which suppressed the endo and the pains went and so did the anxiety and I lived happily and with almost no doctors' appointments for the next 9 years. Until I hit peri-menopause. Which is another story.
But it's all to say - anxiety is a NORMAL response to some experiences in life. Doctors need to stop pathologising it, slapping a label on people and sending them away. It just sits there like some indigestible label which doesn't help the person at all. That person's anxiety is (in most situations) a normal response to what they're going through.