Welcome to the 'family'!
I have been involved in Emergency Services in one form or another since 1989.....from a volunteer firefighter to EMT (both volunteer and paid), fire/police/EMS dispatcher and for the past 11 years I work for the NYS Office of Fire Prevention and Control - which is the equivilant of the State Fire Marshal. I know a local FF here in Albany who has CD - he has been on the job for quite a few years now.
There are some other members here who work in different areas of emergency services too.....
The main thing is to take care of yourself and keep an eye on any symptoms, not letting htem get too bad before seeking treatment. I used to know where every 'clean' toilet was in my coverage areas too.....
Good luck with the academy - are you on the firehouse.com forums by chance?