I have choked on my own saliva quite a few times now. It seems to last for about 3 minutes, and I am gasping for breath, this has been happening for quite a few years. I have been to the dr about it, and he fobbed it off. I actually happened last night which is very frightening, my throat is just so sore today. I spoke about it at work today and someone said it used to happen to their mother and it had to do with thiroid. is this possible?