I Been Having Chills And Fever And I Been Bleeding

I been having chills and fever and I been bleeding for 9 days straight and I have not gotten a period for almost a year cus my son will be 1 next month and I got the birth control call nexplanon in my arm and every time I had it I never had a period so I'm kind of nervous. I had complications during my pregnancy with my son and they told me when they checked my ovaries had ovarian cysts