My Grandson Have A Runny Nose For Over Three Months

My grandson have a runny nose for over three months and temperature of over 100 etc. sometimes I took him to the Dr. and the Dr treated him for an ear infection but the fever go and come go and come and he gets fatigue how can you help my name is Tyson, and he's two and a half years old. Sorry I don't have 20.00 dollars.