In reply to Cade Ryan-
If they increased the amount of fortifier, I see that as likely meaning she really needs it. If she still has an NG tube in place, that can be a big contributor to reflux, as is prematurity on its own. Our DD (born at 27 weeks, home at 39 weeks) came home with medication for reflux and an NG tube, but once we took out the NG we stopped the med. It could be the neosure, but not necessarily. These babies have such increadible nutritional needs, and it's so much work for them to feed, that I think for most really early preemies fortifier is needed. One other option is throwing out foremilk (which is more watery) and feeding just the high fat hind milk, but it's less predictable and I don't know if that accomplishes their goals for vit d, iron, etc.
I have a chest freezer in my garage filled with milk, and have already donated many gallons to Mothers Milk bank in Ohio. My daughter finally caught up to how much I was producing by about 7 months (4 mo past her due date) and now I appreciate having a little extra although I don't have to use it often. But it was all the pumping early on that made it possible.
Everyone is different with their needs for pumping. I ALWAYS allowed myself a 6 hour stretch at night [and I think EVERYONE should allow themselves that, unless their supply tells them otherwise], but still kept my total at 8 times per day. I gradually decreased frequency, checking in on the total volume to make sure that didn't decrease. There was a while I could pump only 4x/day and still get the same amount as when I was pumping 8x, but I can't really do that anymore so I try to stick with mostly every 4 hours. My daughter is getting just pumped milk in a bottle, so that changes stuff too... baby at the breast works better than a pump.
The closer we got to discharge, the crazier I got. DD never had any BIG ups and downs, just the usual, and early on I could tell myself that none of these setbacks were making us stay any longer anyways. It was all stuff that wasn't life threatening, was common NICU stuff, and was fixable. Once it was the last few weeks before discharge though, every failed feeding attempt, every time they had to increase the oxygen for her nasal canula/ cpap whatever, everything was a delay in leaving and it killed me. So, you may get crazier before it gets better. But then you get home, and she's all yours, and you can fortify or not, give meds or not, and only have to explain yourself to your Dr at your appt's every few weeks/ months/ whatever.
Good luck. I'm sorry. Just survive.