Starts and stops in growing are normal. My grandson didn't get taller for a whole year, and was quite upset about it, but recently grew two inches in six months. It is all in the hormonal signals your body sends. I don't know why your growth slowed, but if it is causing you a lot of anxiety, maybe you could ask your parents for a visit to your doctor for a complete physical to make sure there is no hidden cause. Have you asked your parents what their growth patterns were like?

By the way, you can have malnutrition even if overweight if you don't have a healthy diet. Did you read the information in the link I sent you?