Hello and welcome to Ask A Doctor services. I have read your query and here is my advise. * The sweating, chills, migraine, leg and stomach ache indicate underlying infection through some sort of bacteria or virus most likely , though malaria possibility also has to be ruled out. * Though primary relief with tablet paracetamol or acetaminophen, I would recommend to get basic check up with your doc, who can guide further as there is need of lab work with complete blood counts is required or not. Thank you. Regards.