If you're saying you can't eat because of the thyroid that is very serious. Obviously something will have to be done.

I get swelling in my throat too, my thyroid is slowly enlarging, and I get panicky. It always happens at night so I take some antihistamines and just go to bed. There are ways to help your body not panic. I used the www.lifespa.com there is a section about arrythmias that talks about the nervous system, how to keep it calmed down. The massage helps keep me from freaking out when my heartrate picks up and I start pouring out stress hormones. I also have propranolol. It is a betablocker, it blocks adrenaline. People take it for stage fright that can help panic attacks too.

Hang in there, hopefully the 6th will come soon for you and you can get some help with the drs fast.