When I finally enlisted my doctors and got honest I felt like the weight of the world had been lifted off of my shoulders. For the first time in a long time instead of feeling ashamed and like I had to hide something I felt like my honesty opened up the possibility of getting the help I REALLY needed. Before that, doctors were a means to an end, getting more prescriptions.
I went to a doctor the other day, it was so lovely to check no under drinking, I absolutely loved the fact that I had nothing to hide.
Doctors are there to help you. Hopefully you will be met with compassion. Most doctors want to help, and if you give them a chance by admitting that you are struggling, my experience has been that they are very supportive of anyone who is getting sober.
Good luck. Just remember FEAR :Future Event Already Ruined!