Okay moms...my daughter played at the lake all day today. When we got home and I was changing her…

Okay moms...my daughter played at the lake all day today. When we got home and I was changing her her labia was a bright cherry red. Upon further inspection she had white discharge coming out of her urethra(no fever and acting completely normal except that she is very sore down there). It took them two hours to call me back and now she is asleep and they tell me I have to take her to the ER within the next four hours. Do I seriously need to wake her up to go the the ER? Can't it just wait until morning. If I wake her now she is going to be so upset and then if have to walk into the ER with all the seriously sick patients. Do you think it's okay to let her sleep and whenever she wakes take her?