Period problems, is there something wrong with me?

Lots of girl have a different reaction on their periods. I can go three month without a period sometimes and I just don't get why. Sometime I will have it twice a month. I also have diarrhea during my period sometimes. My little sis kinda has the same problem as you she sleeps all day and says her cramps are horrible and will not come out her room for days. I think that you are normal.