J.P.
My 11 month old twins just got over something similar. It was a long, tough battle for us, I must admit. When the ear tugging started and chest rattling, we went to the doctor- 3 infected ears and 2 cases of bronchialitis later, we had to get an antibiotic and another bottle of infant Tylenol.
Home remedies that helped -- vapor rub on the bottom of baby's feet with socks overtop helped the chest congestion. Baths helped with the runny nose gooiness and body aches, and using the snot snatcher keeps the mucus flow coming out nose instead of down into chest. Vasaline on the nose to prevent cracking and bleeding. Extra drinks of water helped keep the mucus thinner (thus helping slow down the vomiting) and soothed sore throats, and mildly watered-down formula helped control the coughing. Their diarrhea ended less than 24 hours after we began the penicillan. Doctor had said it was a simple cold virus that became an infection; it lasts about 3 weeks total -- sorry, not great news there. Ours lasted the better part of 2 weeks. It sounds like it's time for you to make a doctor's appt to check for infection.
As for your Pedialyte question, sorry, I've haven't used that stuff on the kids. Good luck...J. P. Stanhope, NJ