What Should Be Done About Dengue Diagnosed 4 Days Ago In A Teenager And Now Having Another Period Just 10 Days After The Last?

My 16 years old daughter diagnosis dengue before 4 days. Today she gets periods (date was 2 ND of month) but before 10 days she got period. She is very weak . After dengue fever she is too much disturb and feeling weakness. Please suggest me what should I do for her?