If she isn't responding to you in relation to a confirmed booking and you don't have her number to text or call, then I would suggest lining up a reserve. Particularly as you have a big night planned.
I have always found that when I have a confirmed AW booking, the WG usually replies to any emails promptly, presumably in case I want to change the booking in some way. Generally speaking, I am impatient, and if I haven't had a reply with two or three days, then I move on...