M.P.
ALWAYS take a PRObiotic with an ANTIbiotic. It will put all the good stuff back in and it helps my son with his bowl movements.
My son always had loose stool to the point it was full blown diarrhea when he teethed and when he was on antibiotics. It's normal. As for the crying in the sleep. Happens with my son too. The past two nights he has been doing that. :( it sucks, I know. I hope I get some sleep tonight, and I hope you can too!