J.S.
Try letting her drink "full strenth" apple juice!! (4 oz should get it, but you may need to give her 8 oz) If that doesn't work, you can take her to one of the Pediatric clinics (Acute Kids Care, or Pediatrics After Hours) or another Minor Emergency Clinic (Care Now is one we use), and they can check her out. The great thing about these clinics is that you will only have to pay the same copay as your primary doctor. (For us, it's $15 vs. $150 for the ER).
We have taken our son to Acute Kids Care, and they are excellent with him! We haven't had to use Pediatrics After Hours yet, because they have only recently opened. Care Now takes care of all ages, birth to adult. You can also call one of these clinics to ask if you should go ahead and bring your daughter in. I have their numbers if you want to call.
My phone # is ###-###-####. I hope your daughter gets to feeling better soon!! ~J.~