Welcome in H.C.M.
I have gone through your query regarding twitching in throat with difficulty in breathing.
On co-relating the symptoms with possible pathology it appears that you are having some local problem in throat and that could be rule out by a thorough examination of throat.
You are requested for-
1- C.T.scan of throat.
2- Direct laryngoscopy
& stroboscopy of throat.
3- Respiratory function test.
By the help of above investigations and their co relation with clinical findings one may reach to correct diagnosis and that may be manage accordingly.