I am having second fever in 2 days and no stool for 6 days. could you suggest me how i can cure myself? thank you so much

Your best advice...: ...is to get examined, tested, and on the correct medication. Fever is nothing to ignore, and may originate from multiple sources. Also, your lack of stooling raises concern for an intra-abdominal inflammation of some sort. At your age I would want to consider inflammatory bowel disease or a similar gut process. Please don't delay further.