Baby measuring bigger

Anna💕✌
Went today to see the dr am 29w2days an baby is measuring further an is over 3lb😰 am kinda scared he wants me do some diabetes test to ensure i dont hv it an told me i cant keep gaining the weight but i cant see where i gained weight...only tummy big nowhere else😭😭...any1 else baby is weighing big at around 29weeks?