I hv fever for last few days, slight weakness. but i came in contact with person suffering from swine flu. now slight pain in chest and heavy throat.

Get tested: If you have malaise, sore throat, fever, tight chest, etc. these are all symptoms consistent with viral illness. If your encounter with a victim of swine flu preceded these symptoms, your viral illness may be influenza. If you're getting worse, you should promptly seek help. If you're getting better and it's been several days, continue rest and hydration until symptoms resolve.