Dear Welcome to HCM We understand your concerns I went through your details. I suggest you not to worry much. Panic attacks always happen due to underlying anxiety. Therefore you must address the underlying anxiety first. Please understand anxiety and related problems. Once you understand your anxiety, you will be able to keep yourself away from panic creating situations. Therapy always starts with avoiding such situations along with coping techniques when forced to be in such situations. Start slowly, progress gradually, attain neatly. In your case, the vertigo could be anxiety oriented. That is the reason why your ER could not find any problems with your CAT Scan. Believe your ER and live life. If you sus pect, get to another professional neurologist and get your tests done. Once confirmed NAD, then stop worrying about it and consult a psychologist for a therapy. Psychotherapy techniques should suit your requirement. If you require more of my help in this aspect, Please post a direct question to me in this URL. http://goo.gl/aYW2pR. Make sure that you include every minute details possible. I shall prescribe the needed psychotherapy techniques. Hope this answers your query. Available for further clarifications. Good luck.