My son (16 months old) has had a fever going up and down between 101.3 F & 103.8 F for a little over 24 hours now. I have been giving him a fever reducer every four hours but it's not keeping his temp down.. It will go down to 100 or 101 for maybe 2 hours at the most then go back up to 102 or 103. With it being the weekend his doctors office is closed but will be open in the morning for me to call and bring him in.. Or do you all think I should take him to the ER tonight instead of waiting til the morning?