I've seen so many lose their sobriety after 1,5,10, 20 years. It's usually because they have gotten so comfortable that they think they don’t have to improve their recovery programs. Because it works, they stop doing it. They rest on their laurels. They go to fewer meetings. When recovery practices decrease, fantasy practices increase.The only way to stay sober - regardless of the length of sobriety - is to progress. Usually, the new person is told to go to 90 meetings in 90 days. Inevitably this frequency decreases. But at the same time, other activities must increase. Such activities may be chairing meetings, secretarying meetings, leading meetings - and probably most importantly- sponsorship.
Stop thinking about using by finding new ways to progress or you will pick up the first drink.