Blue hands and feet?

Hannah • Hey my name is Hannah. I am a 27 yo SAHM 💙👶🏻 💙4/29/16 💙👶🏻 💙4/23/18

My son is 2 weeks old. I noticed within the past few days his hands and feet will turn extremely blue for no reason. He’s not cold, his clothes aren’t pinching him and there aren’t any strings wrapped around his fingers or toes. They are cool to the touch but not cold. I have tried changing his position, dressing him warmer but nothing helps. My Peditrician isn’t concerned but this never happened with my first and is concerning to me because he is also having other issues with his sugar, and not gaining weight. Anyone else have experience with this? Any advice?