Chest Pain due to chlorine?

I swim competitively, and this morning at training, there was far too much chlorine in the water. The lifeguards open the fire doors, but this jut led to huge amounts of cool air to condense into water vapour. During training, I was exerting myself and was finding it difficult to breathe. Since the session, I have had bad chest pain when I breathe, and two coughing fits where I could not breathe for a number of seconds. What can I do? Will this go away? Thanks :(