Hi,
My DS now 14 weeks old, went from using Aptamil 1 to Omneo Comfort due to reflux aswell. He didn't do too well with the omneo comfort as it made his reflux worse- why we don't know. We were secretly glad as he had really smelly poos with it :oops: . I then changed him to Cow & Gate Premium for hungrier baby when he was 8-9 weeks old and since then he's a changed baby. He became much more angelic and as you know, the first 3 months are the hardest but with the added pressure of dealing with reflux- you feel even more stressed.
His reflux has since got better and he's a bit more settled.
With all this said, however , you know your baby and you do what you think is best. Every child is different. You may find stage 1 milk is ok or not? I come to realise that raising a baby is a bit of trial and error.
HTH,
ang