By way of more general advice, could you phone the consultant's secretary (just ring hospital reception and ask for them) and explain how terrified you are and ask if they could arrange for you to see or speak to, say any specialist nurses they have, who can explain things to you and maybe suggest ways for them to help you with the fear.
Alternatively, PALS may be able to point you in the right direction of someone who could help. They are based in the hospital, though I'd have thought you could ring them. Could you go in to a hospital to speak to someone without anything medical being done, it is a fear of the building itself, medical staff (in person, not online :)), medical treatment or a mixture?
If they can help with that kind of thin, they may have dealt with people who are scared of hospitals. I doubt anyone likes the place but for those who have an actual fear. Does the fear extend to your GP? They can also probably find out information for you (just a consideration for the future).
I know what it's like not getting all the information you feel you need from a consultation, very common I imagine, or not thinking or having the opportunity to ask while you are in there.