Welcome, Cauliflower! It is so easy to get lulled into overconfidence. I once went 13 years and then relapsed after one glass of wine. That doesn't mean I had cravings all of that time, though! I've come to accept that there are no guarantees in life. This last time I found it particularly difficult work to stay sober again. It took SR, intensive outpatient program and AA to get the job done. I had a very brief slip a month or two ago but managed to enlist all of my supports and got back on track very quickly. In IOP, we learned about the cycle of relapse and strategies for dealing with each part of the cycle. That has helped enormously, along with being totally honest with my docs.
I don't stay on high alert but do stay mindful of the consequences. I love my sober life too much to put it at risk again.