Hi I Am 25 And Married I Had Dengue In

Hi i am 25 and married i had dengue in the start of september and i got my periods while i was detected with dengue.. My normal date is end of the month. I again got my periods after 15 days and since 3 months ive been getting periods every 15 - 17 days. I am worried what could be the reason as i was very regular and on exact on the dates every month. Please help. Can it be due to dengue medicines or is it something fo worry about.