What should I do?

Adriana • Be H🌻A🌻P🌻P🌻Y
I'm 16 and my period is really irregular, it will come for a week or a little more and then will come late about a month or two. When it does come I bleed so much that I bleed through level 5 pads and my cramps are terrible. Pills don't help anymore and I'm so confused. Should I see a doctor?