Hi Shirley,
I have a question...Is your lactation consultant board certified? Please make sure. You can find a board certified lactation consultant here
www.iblce.org. Just click on the US or International registry depending on where you are located.
Doing pre and post weights is pretty much a thing of the past. If you are able to pump milk, your baby should be able to latch on and do an even better job and extracting it. But it all depends on how well latched your baby is. Being able to pump milk after a feed indicates one of two things. 1) either the baby IS getting enough milk and you have leftovers OR 2) Your baby is not well latched and not adequately draining your breasts. A baby can "look" well latched to the untrained eye and actually be having problems. That's why it's so important that the LC be board certified.
Also, nipples have pretty much nothing to do with the latch. Nipples are just an exit. Your baby needs to be latched PAST the nipple and well and truly onto your breast. Breastfeeding should not hurt. Your nipple should look the same when it comes out as when it went into your baby's mouth. Have a look at this page on our site:
http://www.asklenore.info/breastfeeding/latching_diagrams.htmlOnce you get the latch sorted out your situation should improve considerably. But remember, there's more to breastfeeding than the amount of milk a baby is getting. All your baby needs is a very tiny amount to get all the immune benefits and other goodies. It's the time with you at the breast that is most important....the nurturing, the bonding....
Hope this helps. Fondly,