Can you overfeed a newborn?

kimikins79

My 11 day old newborn wants to feed all the time (barring when she is sleeping).  She literally would feed every 1.5 hours! 

When she is done, she squirms around a bit after like she has gas.  I hope that I am not overfeeding her, and/or creating an oversupply for me.

 She is likely close to her birthweight (I go to pedi tomorrow) and I have been feeding on demand.  But demand is high!  I just want to make sure I shouldn't limit the feedings.  Sometimes I think she is comfort nursing, but she won't take a pacifier, just the nipple.

Also, how efficient should a newborn of this age be when feeding?  Sometimes both breasts take 45 minutes, other times over an hour, other times only 30 minutes.  I am just unsure of what she is getting, how much, etc.

Thanks for any help on this!