My cycle is so irregular ..

Abby

My period is crazy guys! I will have one for a week with really bad cramps and then it won’t come for one-three months or more and I know people say I’m lucky but I don’t like it I feel like there is something wrong with me I don’t know if I should be worried? I don’t know if I should go to the doctors because I don’t want to be put on birth control. I heard it can make you can weight? I’m 18 shouldn’t they be regular by now????