Your way forward starts with exactly what you are doing, BoonieCat - recognize the idea of drinking again, or of doubt in your ability to stay sober, for precisely what it is. It is your drive to get buzzed again, nothing more than that.
You understand that since you have chosen to quit drinking for good, that these thoughts come from that lower brain function associated with addiction. Because they originate there, they can be observed and recognized by our higher brain function, and we can bring to bear all sorts of cognitive skills like urge surfing, mindfulness and awareness of the present moment.
I agree with soberlicious - you got this. Nothing can make you drink now. Onward!