Ana I passed things like that but not from my throat. In my case they were parasites. I'd be guessing if they are in your throat you also have sinus problems, maybe infected gums or teeth and ear aches.
I'd recommend you do the Dr. Clark's parasite program. She has a herbal program and she has a zapper + herbal program. Either of those should take care of your problem but I had better results with a zapper. It took a lot of persistence to get rid of this one for me.