Make sure that you take documentary evidence that you are doing all this and it will really help your case. It sounds like you are off to a good start.
Also, have some objectives - tell them what you want and ask when is it likely to happen. Asking is fine, discussing is fine, but "demands" are likely to cause delays. Polite pushiness and showing that your mind is settled will work well.
I think you will be OK, it is just you are at that scary point were everything is on the verge of crystallising into a new reality and it is impossible to tell how people will jump until they do. I remember it well, but in retrospect the fear of it was worse than anything that happened.
Good luck!