Dear Welcome to HCM We understand your concerns I went through your details. The symptom you gave here are also corresponding to anxiety disorder and panic disorder symptoms. Dizziness, passing out sensation and shaky feelings could be triggered by too much negative thinking about your health (obsession) and being anxious about a particular symptom. In your case, the particlular symptom turns out to be dizziness, shaky feeling and passing out sensation. When you be obsessive and be anxious about a particular symptom, that symptom worsens. Your stomach problems also points towards anxiety disorder. your previous history of panic attack must have triggered the obsession and anxiety disorder. Don t worry. These symptoms should be cleared in a span of two or three years. You should not be obsessive or be anxious about these symptoms. You may do a good body check up and just forget about these symptoms. You should consult a psychologist for counseling and psychotherapy treatment. If you still need my assistance in this regard, please use this link. http://goo.gl/aYW2pR. Please remember to describe the whole problem with full detail. Hope this answers your query. Please feel free to post follow up queries. Available for further clarifications. Good luck. Take care.