Three of my kiddies had reflux. Two had it severe enough that they were in and out of hospital trying to find a suitable medication to help, and even when they did, it still didn't stop them from chucking up EVERYWHERE.
DD3 was my worst. She was a healthy full-term baby weighing in at 8lb, and was still only 15lb 11oz on her first birthday. I did all the things they told me....tipping her cot, upright after a feed etc, but she still threw up, and also cried constantly because of the acid burning her tummy.
Now tho, from being so tiny for so long (was still in 2-3yr clothes at age 5!!!), she has suddenly decide to grow, and is now the tallest in her class (she is now 6, so just one year to grow loads....majorly expensive clothes bill-wise!...shopping spurges were great!!)
It was amazingly hard work at the time, and not one I ever wanted to repeat...sadly tho, both the boys after her also were refluxers.
Luckily DS1 coped well on gaviscon, and grew out of it by 6mths, alth DS2 was as bad as DD3.
He is now out of the reflux, but is still tiny for his age....he is allergic to EVERYTHING tho, so that could be the main cause!!!!
If your daughter is a refluxer...sending many hugs, and a tip.
Get a tumble dryer if you can.....I would not have coped nearly so well if I hadn't got mine, cos the amount of clothes I went thro was huge.....7+ outfits at least per day