Omnicef and little bit

My 2.5 year old was prescribed Omnicef for possible sinus infection/pink eye the day before yesterday. She had a dose that night and two doses yesterday. After that third dose, I noticed diarrhea like water and went to the Internet to learn a little more about this medication. I found this website and was prepared for what this evening had in store. We woke up at 3 a.m. with her crying inconsolably and very uncomfortable. I held her a little bit and she wanted to be back in her bed, I'm sleeping next to her on the floor when she'll let me sleep. It's MISERABLE... a MEDICINE is CAUSING this!! She's writhing in pain from the cramping of the diarrhea. The benefits don't out-weigh the risks of this medication! I will NEVER give my child another medication without researching it first. Of course, every medication has side effects that you may never experience and you don't know until you try, but it sounds as though this med is MOST LIKELY to cause diarrhea, not worth it!!