I have the exact same experience. It's my physical symptoms which make me anxious. And, like you, I worry a lot about my health. After doing some tests, my doc assures me that my physical symptoms are anxiety-related. If only that would make them go away!!! But it doesn't, and I feel unwell quite a lot of the time.

I still have a hard time believing that it's all "just" anxiety because the symptoms are so physical. And they occur even when I'm not worrying about anything (that's the point when they make me start worrying!!!)

Anyhow, yes, anxiety really can cause very physical symptoms! If you haven't already, I would still recommend having some tests run though, just to rule out other causes that might be behind your symptoms.

Good luck to you!