So I thought my son might have allergies since he has a runny nose with clear fluids coming out and…

So I thought my son might have allergies since he has a runny nose with clear fluids coming out and really congested, but for the past two nights since he got the runny nose he had such a bad night sleep literally waking up every 45 minutes crying...And last night at 3am he was burning up and had a rectal temp of 101.6, gave Tylenol and in the morning his temp was back to normal. Allergies don't give fevers and I thought a cold has colored mucus not clear? I'm going to call dr when they open in an hour 1/2.