I’m eighteen and sexually active. On top of that, I have very irregular periods. My cycles are about 38-46 days long, and right now I’m 16 days late (not pregnant I haven’t had sex since my last period). I was wondering if those types of cycle lengths are normal? In addition, I get excruciating pain when I have period. If I should get birth control which one should I get? I was going for the copper iud, but I’ve heard how painful the experience is…