Fever and body pain. Tests should i do?

Had fever and body 15 days back, treated with normal medicine and pain killer by physician. All was ok after 6 days. But since last 7 days in d afternoon or night d body starts paining especially foreleg, foot, arms and neck. Sometimes during pain bit of temperature is coming. Today after the bath again body started paining and temperature came. This time bit high temperature. Eyes are feeling like irritating as if i have not slept since a long. But body pain is heavy. Was taking rabion dm and seramox c with paracetamol last time when there was fever. As suggested to take paracetamol when temperature will come, now when temperature comes i take a paracetamol at night. Then it gets ok till next afternoon. Please suggest me ahy this is happening and whats to be done. What tests should i do? Please