So my son has a sore throat? I’m not sure but he like to do this weird screeching noise and likes to…

So my son has a sore throat? I’m not sure but he like to do this weird screeching noise and likes to get loud and yell cause he likes to hear himself. He’s been doing it a lot lately and today he tried to do it and he sounded kinda horse and he’s been coughing too. I’ve been giving him cold liquids and encouraging him to eat his soft baby foods and I didn’t let him have his rice rusks, puffs or yogurt melts today. I’m taking him to his doctor on Monday, but is there anything I can do to help him for tonight, tomorrow and tomorrow night? (Pic for attention)