Stay strong. Like many of the posts I've seen on here, and I agree with, take it one day at a time. When you wake up tomorrow sober, you'll feel so much better knowing that you beat the urge to drink. After a bad day, a good nights sleep is really the best medicine. As far as your trigger, maybe finding a better way to cope with the stress? I'm no psych, but I like to listen to calming music and take deep breaths. It calms me and helps me focus on what I can do next time to be better.
Well done on 16 days! Stay strong.