A.D.
She absolutely has to be under the care of a medical professional if this is truly the case!
Sometimes though, diapers can be SO absorbant that it is hard to tell if a newborn is actually peeing or not. When my daughter was a newborn, I had a hard time telling if she had gone, so they told me to put a small piece of folded tissue (unscented, white) in the diaper, and then it's easier to tell...and yep...she was afterall!
Hope the baby is doing better!