There are lots of things that can cause anemia, like a lack of certain vitamins for example - so yes, maybe don't try to always go to the disaster thinking!
I'm glad about the alcohol thing, you sound firm about that.
You know, doctors see so many different people, nothing you "look like" is going to phase them. If anything they understand better than anyone what phobias and mental challenges can do.
Anyway, I'm really glad you are going to keep your appt. on the 14th, I'm sure he will have suggestions for you and maybe even medications that can quell your anxiety enough so you could see a doctor.
Try to keep good thoughts, I know it's hard sometimes, but you are doing well just making and going to the appointment.