I feel for you:( If she's still gaining weight you don't need to worry too much. My first son had reflux. It's over-diagnosed, but it definitely sounds like yourdaughter has more than just excessive spit-up. The Zantac cut down on the screaming but not how much he spit up until he was older. He especially threw up everything if he sate too much. Here's what worked for us:
~We set up a 3-hour schedule instead of nursing on demand, with just a little lee-way. He threw up projectiley if he nursed any more than every 2 hours.
~I only nursed one side at a time and if he REALLY wanted to nurse again before 2 hours was up, I put him back on the same side so there wasn't much there.
~He slept in his car seat next to the bed until he was 6 months old, sitting up more helped and it's totally safe until they can squirm out. Even our pedi. told us his kids slept in their car seats! Sitting up helps a lot.
~It took three months of letting him suck on our pinkie fingers before we found a pacifier he'd take. Try one of each on the pacifier wall if you have to. Then, learn the difference between "my tummy hurts" and "I'm really hungry" so you don't over-use the pacifier and starve her.
~When no other form of comfort worked, we put him in his car seat and swung him hard, fast, and high, back and forth until our arms felt like they were going to fall off. It worked, it was worth it. I'd swing him 10 times on each side and got a bit of a work out:) lol
I know it seems awful right now, but it gets better, I promise. Feel free to PM me with any questions.