Am 26 and will be married by next year. But am having a problem of missed cycle always for almost 5 years now at times it comes and sometimes it comes only when I take drugs .this year I missed my period for 5 months. I treated infection but to no avail after taking primolut n, I had a flow for four days now today makes it 33 days after my last flow. What do I do and what drugs should I take am seriously worried. And I want to know the causes.