Dear Linda Pohl,
Here's my $.02 worth. Pain that soon after birth is most likely trauma.
Alison Hazelbaker calls it nipple compression syndrome. The trauma is from
improper placement of the nipple in the baby's mouth - first work with her to
assure perfect, and I mean PERFECT positioning. Try several positions - if
even ONE is better, use it without trying for variety. If that doesn't help,
do a suck assessment for improper tongue peristalsis. If the suck is bad,
milk transfer will also be bad. Consider pumping and cupfeeding for a few
feeds at least while you (and others?) fix the bad suck. If a poor suck is
the cause, staying at-breast will be counterproductive to both till it's
fixed.

If the nipple pain persists with pumping, consider (1) subclinical thrush,
especially if it stings, burns or itches, or (2) hidden psychological issues.
 DO NOT explore the psych stuff till you've ruled out all mechanical problems
(trauma) and infectious conditions. As you explore the trauma and other
causes, psych stuff usually comes out on its own and can be dealt with.

Linda Smith, I've had some of these too.
LC in private practice, Dayton OH