Hi Matt,
Welcome to SR! Going to see your doctor was a great first step, and I'm glad your fiancé is supportive as well.
I haven't taken Campral, so no help there. This site is incredibly supportive. Spend some time reading around. Check out the January 2017 class thread, you will find a supportive community of others who have also stopped drinking this month. Also, the 24 hour recovery thread is a great place to check in every day for 24 hours, and to meet lots of members on here.
You can do this!