Hi, I'm sorry to say I do not have any advice for you, but I'm afraid I may be going through the same thing soon. My boyfriend will be attending a facility for meth addiction very soon and I worry about the unknown.
I guess it's good that the counsellor has spoken to you about it and I'm sure that they would let her know that you have called, or if they don't, I'm sure she's been made aware of their rules for no contact. Have you found out if there will be chances to see her later in her stay? I have heard there can be scheduled visits...unless they're only for family...???
I hope there is a chance for you to see her, but if not, I'm sure it's for the best. They ultimately have to do this themselves.
Best of luck, please let us know how you go...I have no idea what to expect while my boyfriend is away, and I know what you mean about having friends/family sick of hearing about your worries. This forum is great to get things off your chest.