Propping baby up to sleep

My baby is two months old and he feeds well, but often wakes up crying due to reflux one hour after. I tried propping him up with the feeding pillow to sleep. I know there are safety concerns so I watched him the whole time, he slept so well and didn't squirm much. I'm hesitant to let him sleep in it for long though thinking his bones are really soft now, I don't want to cause any curved spine! What do you ladies think? Any other good advises on how to prop baby up to help with reflux? He sleeps really well facing downs too but that's a major SID risks.