What Leads To Excess Sneezing And Nasal Congestion After Inhaling Bleach Fumes?

I was cleaning an enclosed hallway with high ceilings and sprayed a bleach water solution on the walls and part of the ceiling. I was probably in the area a total of 15 minutes, if that long, as I'd leave the area and come back to it. However, when I left I continued to work in a room next to the hallway. Thus, I worked in or near the bleach fumes an hour or more. Now I'm sneezing and my nose is producing a lot of mucus. I've coughed a couple of times. (I was totally asymptomatic prior to working with the bleach). Should I be worried? Go to the ER?