So I've got a question because I've never dealt with this with my first born. My LO was 10 lbs last time we went to the dr and she's in a size 1 diaper right now and they go up to her belly button but I've noticed that they leave red marks on her thigh area. Should I go up to size 2 or should I keep her in the ones until she reaches the weight to be in size 2? I'm just really curious because I don't wanna keep her in a diaper that's gonna irritate her skin. Please help thank you! She's not even 2 months old yet either!