I don’t make any sound, but I get that same spasm-like feeling. My anxiety is usually centered around my health, so unexplained bodily sensations tend to freak me out and it seems like whenever I get comfortable with one I invent a new one. First it was chest pains, then it was headaches, then it was tingling and numbness, and now I’m on to silent hiccups. Anyways, just wanted to get that off my chest and see if anyone else had a similar experience