the best answer to it, is to see a gyno and get a pep test and other tests they do since the first time you got ur period....i was curious tho! when i get my period i always have a lot of back pains aside from taking pain killers wat can i do to stop the pain?
Like a few people have mentioned, some people are irregular. I once not had mine for 6 months, 6th months pain free .. then there was irregular periods of 3 months and 2 months. Seem it runs in my family when I talked about it with my mother and my 3 sisters! >.<