I'd think that if you told her about your symptoms, they'll get you booked in. The weeing may just be normal pregnancy weeing - so it is a bit subjective. And you do need more to drink as well.
Hope you hear from her soon!
And Britwife is right, they are looking for symptoms, not waiting for you to tell them necessarily. GD is pretty serious if left untreated obviously! But I think it can come on pretty quickly so you're doing the right thing ringing her.
Stacey, what sort of contact numbers do you have for your midwife? I have one for non-urgent messages where they can ring back at their convenience and one for 'emergencies' which is for anything where you want to speak to someone asap. I used that when I woke up with elephant feet - the midwife stopped round 2 hours later!