@Tefiti2 yes, DD had reflux and we think the baby has it too, but very mild.
Things you can try:
Carobel milk thickener (over the counter, not medicated. You mix it with a bottle of FF, it's a faff for BF babies though)
Wedging the cot/crib somehow. We bought a foam wedge from Amazon that lifts him up slightly, it lets gravity stop the acid from rising.
Keep her upright and still for 20 mins after a feed. It's guaranteed puke here if we don't do this.
Medication wise, some doctors don't "believe" in reflux so it can be a challenge unless there is a concern over weight gain. They will normally start with gaviscon which made DS horribly constipated so we've abandoned it. Next step would be ranitidine which worked wonders for DD. It builds up over time and really helped with her pain. Omezaprole is another option but I think it has to be serious for that to be offered.
Is there a pattern to it? Is it the same time every night? If so, it could be a little bit of colic. The symptoms can be similar.
But solidarity. It's awful, especially at night. We struggle to get DS down after cluster feeding and his tummy is clearly hurting him.
Oh. And a million muslins.