1) you need to see what the Pediatrician says.
2) IF you don't have enough milk... baby is basically always starving, thus not satisfied and always hungry...thus, they will not sleep well. Anyone who is starving, will not sleep well.
3) IF you don't have adequate milk supply....she will not be growing, gaining weight, or having enough wet or poopy diapers.
4) IF she is not getting enough intake, she can become dehydrated which is very dangerous for an infant....CHECK her fontanel (soft spot on her head), if it is caved in, then she is probably dehydrated.
5) TAKE your newborn into the Pediatrician.
6) Suspicion of not having enough milk to feed your baby, HAS TO BE taken care of or looked into right away... or your baby will not develop properly and will be starving.
7) The amount you "pump" is not always what you have in your breasts.
8) You NEED TO FEED HER ON DEMAND... and frequently, if you want her to be content, satisfied, and full. AND, by feeding her on demand, you are thus, helping your breasts to produce milk.
9) Each baby is different.... just TAKE your newborn into the Doctor and/or check with a Lactation Consultant.
10) You cannot feed a baby according to a "schedule." You MUST feed your baby according to 'THEIR' hunger needs. Like any human or adult... appetites and intake needs vary... each day. The same for a baby. Some babies even have to "cluster feed" which means they need to feed practically every hour. This is ALL "normal."
I would really take your Baby to the Doctor and check. You cannot wait... if she is "not" getting enough intake, she is constantly starving. Any baby will cry if they are in this situation. You MUST check your breastmilk supply....
For gas, tell your doctor this as well... so that you can be extra sure it IS gas, and not simply something else like hunger. You also want to be sure you are nursing her long enough... a baby has to get to the "hind milk." This takes at least 15 minutes of nursing.... then nurse her for as long as it takes... some babies take at least 1/2 hour or more, per nursing session. This is also normal.
Take care, I hope baby will feel better,
Susan