This used to happen to me all the tim ewhen I was teaching YG, at least twice every winter.
A hot toddy is good - big shot of whisky, brown sugar, lemon juice and boiling water. Or my Gran used to do Hot Buttered Rum - double measure of dark rum, big teaspoon of butter, sugar and boiling water.
Gargling does help. Tyr taking vit C to stave off future colds as you might never get near the doc and cant cope with nurses.
Jurgen is a leader for kids rock our local kids acticities, but he really likes it.