S.T.
S., you are certainly a champion worrier.
modern diapers are incredibly well-designed so that they don't feel wet. if she's drinking this amount, which seems healthy and normal, and seems fine, and isn't bloated or complaining, she's fine.
mention it to your pediatrician next time you go just to ease your mind, but i'm sure she's fine.
take a deep breath and just enjoy her.
khairete
S.