Lulu- DONT YOU DARE BE SAD!!!! You have done an amazing job at this bottle situation! Sit back in the computer chair and really look at how well you gave it a shot!
The thing is, is every baby is different and you have to try different allies with your different babies. This ally didn't work, there are MANY others

Dont be sad it didn't work, be proud how hard you tried

PLease stop being diflated as this time in your life WILL NOT last and once its over and done with you'll be able to move forward with your beautiful little family and this will all be past Take care and good luck with the appointments