My cat is sick..:(

Today i went to malaysia with my mum to buy her things..we went there for about an hour..when we reached under our block,i saw my cat sleeping soundly..i call his name and he respond..he walk to me and suddenly he cough..this time its really serious cause he normally he will cough about 2 times or so..but now he cough continuously..oh god please help me..save my dear cat..:(..i love him so much and can't bear to lose him like my hamster..