ALL the symptoms you have described sound like classic anxiety , so please don't worry yourself.
As far as I've experienced the throat thing is quite normal with anx , others include clearing your throat , swallowing excessively , voice changes............I think it's all to do with muscle tension - deffinately the lump in the throat , all your muscles are taught and are pushing your adams apple inwards , I reckon that's the lump.
Hey your hearts getting a good workout from those P/As , you're probably fitter than your collegues
The breathing exercises do wonders to curb a panic attack - as does positive thinking , both together they're a winning team.
Take care ,
DX : Bipolar , Panic Disorder , GAD , OCD , IBS.