DDAY2,
Page 15 and 16 of the first link here list the diagnostic criteria as defined by the International Headache Society (I.H.S). This is the same diagnostic criteria used by specialists to ascertain just which type of headache you have, the degree of severity and duration.
"Chronic" implies a specified period of duration of attacks without remission.
This document does not tell you what the chances are for you of becoming chronic, but it may help you to put your condition within a set of guidelines. It will certainly tell you if you meet already meet the criteria for "chronic" CH.
This is the "Pocket version" and is shortened from the entire criteria, a much longer document.
http://www.eurohead.org/resources/download/ICHDIIShort.pdf
Here is the full version:
http://www.i-h-s.org/upload/ct_clas/ihc_II_main_no_print.pdf
Good luck with it mate.
Cheers, Ben.