What Causes Joint Pain?

Dear Doctors,my name is mayur i m just shifted mumbai from nashik few days ago on sat my all joints start paining, on sunday afternoon i was not able to even walk n i had too much fever. then same day eve i went to nearest doctor n he gave me some tablet after tht night in morning i feel better but yesterday there was heavy rain in mumbai n unfortunately i did not find any taxi to go to job so i just walk till my job n i was little bit wet whn i reach to job. so yesterday i feel little sick again n when i wok up today my feets frm knee are solen n i m feeling like fever and i m not able to walk is it happend to me bcuz change of climate or any thing else ple consult me. i m eagerly waiting for ur reply.