I had a lot of fear, but it wasn't of picking up a drink and what I might lose, it was of quitting and how I would live without the bottle!
Fear fades with time and our addictions are so strong and patient, they lie in wait until we feel stronger and more confident again.
Speaking for myself, I couldn't have quit on fear alone, no. I would have convinced myself at some point that my fear was imagined and I could drink again.
I'm in AA, but if it isn't for you, I would arm myself with as much knowledge and understanding of addiction as I could. Look up AVRT. Go look at the secular forum, there are lots of ideas.
Best wishes to you x