My 6 month old son started taking Omnicef 6 days ago for a bad ea...

My 6 month old son started taking Omnicef 6 days ago for a bad ear infection. On the 5th day he started having reddish colored stool. I called the doctors office and they said if he has any more (which it sounds like he will), then they are going to test his stool for blood. He isn't sleeping well either. He becomes so tired but won't allow himself to go to sleep. He just lays there sobbing. He also started having a fever last night and this morning. He only has a few more days on this medicine. I just hope it helped the ear infection. I would hate to think he was on this medicine with all these awful side effects, and still has an ear infection on top of it all. I do agree, the reddish colored stool should defiantely be listed as a possibel side effect.