I feel physically ill quite a lot of the time. My main symptoms are nausea/queasiness, headaches, chronic backache, tightness in my chest, feeling agitated. That kind of thing.
I also suffer from anxiety and panic attacks. But the thing is, it's often the way I'm feeling physically that triggers my anxiety/panic attacks. For example, I may suddenly start to feel nauseated, and that will immediately cause me to become very anxious (and to feel more nauseated).