What Is The Cause For Red Dots On The Tongue With Cold And Cough?

Hi my son has had a cold for the last week and a half with a cough which is getting worst I had him at the doctors around a week ago and they provided an inhaler as the cough had got into his chest however it has gotten worst and today he has been coughing so bad he s being sick lots of flem I put a torch to see inside his mouth and his tonsils look red too but the thing concerning me the most is lots of red dots all over his tounge I am thinking of taking him to hospital as doctors is closed until tommorow however I thought I would seek advice first as he was at doctors a week ago and this is my first child don t want to seem over paranoid can you give me some advice please x