I too have had probs with throat could'nt even swallow food it got that bad! It's all anxiety unfortunately...got over all that and now dealing with all day long hyperventilating which has been really stressing me this causes chest tightness and pain! The twitching i use to get this in various parts of my face when feeling really stressed out at the moment i keep getting it in my arm!
At times it does get really over-bearing and terrifying when new symptoms arise ..thats why its great to have a place like this site to come to ..you'll always find some-one that has had the same thing ...which can ease some of the worry! Hope things get better for you soon take care Jodiex