Hi OP you sound to be having a really tough time of it. Its not easy having a baby with reflux, nor one who screams all the time, there's no wonder you are struggling. Have some
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I want to say gently that I agree with FATEdestiny it sounds like she may be being overfed. 6oz every hour is an enormous amount for any baby & this is likely why she is bringing so much back up. Sure this can be due to reflux - acid burning the eosophagus is soothed by sucking, hence the desire to eat frequently (little & often is generally better fir reflux babies) - but could you also be misinterpreting her tired signs & feeding her when she actually needs to sleep?
I was guilty of doing this exact same thing with my ds (now 4) when he was a baby. He fed every 1.5hrs at one stage & he also had reflux & cmpi. With hindsight I realise I often misinterpreted his tired signs as hunger (very easy to do) & I do wonder how much I contributed to his reflux by overfilling him.
I have been much more careful this time to pay attention to tired signs & try to settle dd (also 14wks) by other means, not feeding before 2.5hrs.
For comparison's sake she is currently having feeds of approx 4-5oz every 4hrs (on demand) in the day & feeds 1-2 times at night. She takes a total of around 25 oz in 24hrs. She still has a touch of reflux but it is nothing like her brother was.
WRT your concern about keeping your dd topped up with food because of the jaundice she had as a newborn, that shouldn't really be an issue/needed now. My dd had to have light therapy for jaundice & had to be tube fed for a few days as failure to thrive. On leaving hospital advice was to feed 3 hourly until jaundice gone & birth weight regained, then feed on demand. Perhaps seek some reassurance from your gp on that if it will put your mind at rest.
I understand your desperation to settle her when she cries, but I would urge you to give FATE's advice a try & stretch out that feeding time. Definitely keep the dummy for the time being - it is by no means a subsitute for mummy but another means to help her settle. I see you have mobility issues - can you manage to get out for a walk in the pram & if you do will she sleep? This always makes me feel so much better if mine are unsettled & they always nod off. I think if you can space out the feeds a little bit more she will actually start to take more milk on board, throw up less & be less uncomfortable.
Finally if this doesn't help, persist in going back to the dr again & again until they do something. It annoys the hell out of me how so many health professionals know so little about reflux/cows milk intolerance or how to deal with it.