Don't be ashamed! I have it also. There's more than one kind of chlamydia and it's as easy to catch as breathing! Some researchers also believe it's possibly a "gateway" infection that opens the immune system to all the other nasties.
"The Chlamydia pneumoniae (C. pneumoniae) organism, first described in 1988, is not the sexually-transmitted type. It is an airborne organism that you get from breathing after a person carrying the organism has coughed."