I've been thinking on this.First of all are you under a great deal of stress or feel depressed.Did this just come out of the middle of nowhere?Were you consuming caffeine or anything with MSG?Those things can contribut to a panic attack.Which your symptoms are similar.But if this came totally out of the blue i would venture to have your gallbladder and thyroid checked.Either of these things can bring on the same symptoms.When you say that focusing on your throat makes you more anxious that make me think anxiety but again the above can mimic anxiety.I recommend getting a physical work up to check out those things.I recommend distraction from thinking about your throat.Bach rescue remedy,homeopathic aconite,chamomile tea are all good to help ease the anxiety.Also please know that you can not die from anxiety.Won't happen.It is all psychological.Remind yourself it is just anxiety and it will pass very quickly.Relax your body and mind and allow the feeling to pass.Which it will.Again i have friends who experienced sudden breathing/throat issues and it was actually their gallbladder.I hope this helps!