Trouble swallowing food?

Recently I have somehow not been able to swallow. As of right now, since Monday I have had a cough and some phlegm in my throat but I don't know if that has to do anything with this. When I eat, I would chew the food but when I would try to swallow it sometimes has trouble doing that. I was reading other pages on this and it says that it could be a problem with your nervous system but I don't remember anything that I could have done to cause a problem with my nervous system. Also I read about have anxiety can cause this. And about a few days ago my brother ped away and I am thinking that this could have triggered this.