I Have Menorrhagia And Dsymenorrhea. To Stop The Menstrual Bleeding

I have menorrhagia and dsymenorrhea. To stop the menstrual bleeding I need to take primlout n 2 tab for 14 days and 1 tab for another 14 days. How can I get my normal period? Bleeding won't stop till I take the pill. After learning the possible side effect I don't want to take it but I have to otherwise the loss of blood makes me dizzy. What should I do?