Yup... pursuiters cough. Just like the others say here.
After a TT I know I couldn't have done more if I have it... if I don't cough for a day or so after, I know I slacked off somewhere!
By the end of a well-ridden TT I will be breathing heavily - sometimes "wheezing" and breathing mouth wide open, sometimes toungue hanging out (real glam, I'm sure).
Glad to hear you are getting the chest pain checked, limewave.