Not acting on thoughts of drinking is winning!
Thoughts have a "mind" of their own, you can't control what thoughts may come, they just do, it's what we do about them that counts.
18 days is fantastic , but also early, it gets better . The more times you successfully dismiss thoughts of drinking, the stronger your resolve will get and eventually the less those thoughts percolate all the way to the surface.
Keep trucking ,you're doing great, It does get Better.
You're Winning, not failing , the AV is only thing that would attach negative thoughts of any kind to Not drinking.
Hang in there, it gets better, if I didn't already mention that