I am suffering from after effect of Chikunkunya like swelling in feet, pain in joints etc.?

The fever is usually gone within 5-7 days, unfortunately, the swelling and pain in your joints can last much longer. The only treatment are analgesics. Non-steroidal anti-inflammatory drugs such as, ibuprofen/motrin and naproxen, (however, avoid aspirin.) You can get such pain relievers over-the-counter. If you need something stronger, see your doctor.