Fraternal Twins...PLEASE READ I NEED ADVICE

Melisa
I'm currently 23 weeks with fraternal twin girls. I had a ultrasound done yesterday and one of them are 1 pound 7 ounces the other is 1 pound. The doctor told me the baby that's one pound is small compared to the other one and she could did in my stomach and so fourth(she was being very sweet and consoling about it) I'm just scared and don't know what to do if there is anything I could do to help the baby or If someone with twins could give me some advice. First two children.