K.C.
We have many, many MANY moms who nurse through their pregnancy and tandem nurse and infant and a toddler.
I completely agree with Dori - so many women think what they pump is what they make and it is completely FALSE. Children are the pump-pros and your body releases much better for them than a cold, mechanical pump. Feel free to join us on Facebook at Cape Cod Breastfeeding Moms!
If she seems happy and is satisfied, just continue to nurse her. Make sure you are taking a good multivitamin and I suggest LUNA bars as a great healthy snack. Drink plenty of water.
Also, as your hormones change during pregnancy you may notice your milk change slightly - increase, decrease, change taste, etc. As long as you keep nursing, it won't be a problem :)
Cheers!
PS - wetnurses from the 1600s could nurse 7 babies at once, so yes - when needed we super women can make a TON of milk :)