Does it make much of a difference?

Does it matter much that my baby is weighing ahead by like, three days? My MIL just told me she'll be fat all her life because of it 🙄🙄🙄 I need a loooooong break from her. I'm 32 weeks+6days and she's measuring at 33 weeks+2 days and she weighs about 5lbs even according to an ultrasound I had today.