my 10 month-old was prescribed Omnicef suspension 5ml a day for a...

my 10 month-old was prescribed Omnicef suspension 5ml a day for a lingering cold that turned into a sinus infection, before that she had taken amoxicillin for ear infection. took it for 10 days, was ok. 2 days after finishing taking the medication, she started her diarrhea/loose stool (no more than 2-3-4 BMs a day, just loose, runny, mucousy, light yellow (like yolk+sour cream mix)-green-ish color. 7 days into the diarrhea some black residue, filament/dill-like came out in the stool for three days. all this time the baby had been eating rice cereal, toast, and formula. What I'm saying is those things came out of her body, wasn't something she had eaten. Yesterday was the 10th day of loose stool, and took her to the ped. was prescribed Lactinex to restore stomach bacteria. All this time the baby was not herself: waking up and crying at night (cramping, aching?), very clingy and whiny, turning her head at the sight of the solid food (rice regimen), lethargic at times, irritable, mood swings, sticking tongue out (dry mouth?), shuddering, crying when touched, picked up, put down on her feet to stand, her runny nose is back. Last night she woke up at 2.30A CRYING in terror, lasted for about 2 hours on and off, by 5.30A was up and never gone back to sleep. She usually sleeps 12 hrs solid 7P-7A. She also had a BM- first in 36 hrs-which was the opposite of what she's been having for 10 days- hard, and some loose around, and a patching compound consistency, porous and sandy... She may have woken because of bloating, cramping, difficulty passing the stool. But the crying continued after she relieved herself. Had I known about the side effects, or this forum before..I would have stopped the medication... Although it may have been difficult since the full-blown symptoms kicked in 2 days after finishing the 10 day Omnicef regimen. If there is ever an FDA complaint to take this med off the market for good or for further testing, sign me in...