Welcome to SR! I also agree with the above posts in regard to medical assistance. Having an irrational fear of the unknown is not uncommon, however, having a rational fear of continuing to drink would be very wise. Obviously you have come to that conclusion on your own
As for the unknown? Life, for me anyway, is much less frightening since I got sober. The unknown can be truly amazing and fearing that first step to discovering what is around the corner keeps many of us unhappily continuing the path of destruction we have been on.
Talk to your doctor, please. I wish you much success on your journey to sobriety, your husband as well. Keep posting and let us know how you are faring.