29 weeks n almost no weight gain

Nicole • Mother of beautiful baby girl Riley🥰 my family of 3

29 weeks I’ve only gained 5 lbs I lost 20 at the beginning of pregnancy n my baby is weighing 2.7 when supposed to be between 2.9 2.10 but head n stomach are a little small. Everyone tells me I need to eat more n but more weight on so the baby will put the weight on but all I do is eat n eat n eat. But not really gaining anything. Everyone always on my ass about it. Any one else dealing with this.?