Help ?

Okay so i really have a weird period. I’m only 21 and this been going since i was 18. My period is outta whack i never have a set schedule. My period just came on after 10 months. It came in 12/26/17 & my last period was back In February. Almost a whole year 🤦🏾‍♀️. Why does this happen to me. It when it comes on it’s real heavy and sometimes brown. My obgyn said i need to loose weight for a regular schedule. Is that normal ?