it takes more then one dose of anything to produce withdrawal symptoms, usually more then a week straight of use more like 2-3 weeks. Anything you feel after a single dose can be attributed to hangover.
Although some steroids like prednisone can be pretty addictive after only a single or a few doses.
from keeping an eye on this thread i think he meant using the drug while he was kicking, like almost getting through it and using once is it like starting over? i actually kind of been curious about this point about any addicted drugs , i used to go cold turkey from dope for two days then couldnt handle third day and would say well one shot wont make it start over, but i never really found out because i usually just started all over. sorry hope i made some sense
to op i am pulling for you hope your doing ok.