My 7 1/2 mth old daughter was prescribed Omnicef for an ear infec...

My 7 1/2 mth old daughter was prescribed Omnicef for an ear infection. She has been on another Cephalasporin based drug before but with this one she has had episodes of vomiting (approx 1 1/2 hr after receiving the medication) as well as bright orange/red loose stools. After doing some reading it says that the red stools can sometimes be caused by a reaction with iron supplements - the same that she has in her formula but I'm more concerned over the diarrhea mainly because both my husband and I are working full-time and I can't take her to child care with the diarrhea but we can't afford to stay home for the 10 day course. Of course Lizzy is receiving the medicaiton once daily and although I haven't spoken to her Dr. yet (I'm calling tomorrow( I'm wondering if we should split the dose into twice daily. Otherwise she still seems happy and bright. Eating okay and interacting normally. I guess I'll see what the doctor says tomorrow