It take a good few weeks for the milk to get out of their system and then for the inflammation to die down unfortunately. I feel for you, I remember those days of incessant screaming all day and all night. It's really tough.
We had neocate, lansoprazole & cetirizine. Added carobel a couple of weeks later. Weaning at 17 weeks helped a bit, but the real turning point was steriods (sadly). It was the only thing that got the inflammation under control in the end.
I used to feed every 2 hrs around the clock, but only small amounts and gradually built up to larger feeds, but DD was premature and very under weight by that point (had spent weeks throwing everything up + shocking dirty nappies). Feeding her upright (not laid down as they would be breast fed) helped as did keeping her upright after feeds. I also propped the cot head up by about 7 inches so she was never lying flat. DD seemed most comforted by movement, so I used to just walk up and down the landing holding her upright against me. I know this sounds insane, but my Mum bought me a CD of music called 'baby cello' it was the most chilled music you'll ever hear. I used to play it low whilst walking DD back and forth - not sure if it was in my head but I swear it helped!
If your DD is still throwing up a lot, bear in mind she's hungry / thirsty and likely guzzles which doesn't help with wind. Not sure if you can get 'slow' teats? I'm pretty sure I got some which didn't 'flow' so easy so she had to take the feed a bit slower if that makes sense?
If your DD has been diagnosed with CMPA (vs a dairy intolerance) please steer clear of soya and anything that comes out of a nipple (goat etc) they all have similar proteins to dairy and can cause the same reaction.
My DD also had skin issues, and I found this really helpful in soothing the soreness: www.oilatum.co.uk/main/index.html
It's really tough, but it gets easier I promise x x