Irregular periods

Hello I'm having irregular periods, it's crazy!! For two months I'll be 36 days then I'll be 22 days then I'll be 28 days then back to 36 days...what should I do? It's hard to keep up with it. And also my hormones go super crazy during my periods. I get super nauseas and I crave stuff my boobs get super sore..i can't stand the smell of things..but only a week before my period. And sometimes they are longer but never shorter. Thank you in advanced..