This was me a few months ago :-( now diagnosed with CMPA.
Baby had clear skin, normal poop, fed fine. But big vomits, every single day. My baby was breastfed and at 4 months I went vegan and it stopped overnight. CMPA has now been diagnosed by an allergist and my baby can have either breastmilk with me on a diet completely excluding dairy or an amino acid based formula. (He was confirmed CMPA through both a patch test and supervised reintroduction of dairy, at which point the vomiting would start again, it was brutal.)
I got nowhere with GPs and health visitors and tried gaviscon, etc. it just made the vomit chunky and my baby still deeply unsettled. He was also reviewed for pyloric stensosis, so it sounds like a similar care path to you.... Because he was otherwise healthy they just did not care that we were falling apart at the seams.
Please try an amino acid based formula: alfa amino, neocate, nutramigen puramino, etc... If it is CMPA, or a lactose intolerance, moving to these will confirm it very quickly and you'll see an improvement within days. These formulas have nothing that should upset your daughters stomach and I wouldn't want you to have to suffer any longer, in case it is something solvable. (As an aside, whilst these formulas are pricey if you try it and it does solve the issue, discuss with your GP and they'll be able to provide a prescription for them.)
If they don't help, then I am so sorry, reflux is awful. Sad baby, sad parents.
You haven't ruined your life, its just really hard right now, you are in the middle of something awful. Please reach out to friends or family to give you a break for a few hours or even an overnight if you are comfortable with that. No shame in needing help.