I think you're on the right track, especially with trying to minimize intake until you can consult your doctor.
Wondering if you could call him & try to get an earlier appointment than 2 weeks though. A lot can happen in 2 weeks - you could lose steam on your intention, or - far worse - could encounter some of the "bad life & health consequences" that accompany addiction. It is definitely an "urgent" medical issue!
I know that many doctors will - if they don't have immediate openings - give you a cancellation slot if you call in daily.
I'd definitely try to see him as soon as possible.
Also, know that if you decided to check into an in-patient detox they might not need his recommendation at all; they typically will do their own admission interview process...