Periods?

Ok, so I'm a little worried because it's almost been a week without me having my period. It's happen to me before in the past, but only for a few days. This time it's longer. I know it doesn't have to do with me being pregnant, unless I'm the next Virgin Mary 😅 I'm wondering if this happens to other people or if maybe I should go see my doctor because something might be wrong with me. I haven't even started my birth control yet so I'm literally like wtf right now