Hi thanks for your question.
Pharybgitis that is sore throat
along with mild respiratory tract
infection do occur after general anaesthesia
,if endo treacheal tube is put into trachea for anaesthetising a patient.That is normal and usually get resolved with in 2 to 3 days.Rarely needs antibiotics.However if you recived TIVA that is total intravenous anaesthesia chances of sore throat along with respiratory tract infection are very less.Holding of mask on your face by Anaesthetics nurse will not give your sore throat.Any way there is nothing to worry .you are already on antibiotics,hopefully it will get resolved soon.
Hope this answers your question.