Not the Flu

C has had a low grade cold for about a week now. It began as her sicknesses usually do with fever and throwing up as soon as anything hits her stomach. This only lasted a day (last Friday into Saturday). Since then she's had a lot of congestion in her chest and throat, and she tends to spike a mild fever most afternoons. She coughs constantly, especially in the afternoon and night. Coughing brings up mucous and phlegm which she then has trouble swallowing, so she throws up. Lately the coughing at night and first thing in the AM can last for 20-30 minutes. The daily debate is: do we send her to school? Generally once she is up and has cleared out whatever she needs clear she is OK for the day. She started on antibiotics yesterday to treat for assumed respiratory infection. Am also concerned about urinary infection: As of this AM she hadn't peed since I got home at 6:00pm yesterday.