3 week old son has acid reflux😩

Stephanie
So my little baby boy is three weeks old and he has acid reflux bad. His doctor just put him on zantac ( 1 ml twice a day). I started him on it 2 days ago. I have noticed that he's not throwing up like he was after feeding. Just a little spit up. The doctor said it will take about a week to notice a difference. He still screams and freaks out alot. Very fussy. I can tell he's in pain and it breaks my heart💔! He has a rock n play that has an inclined seat so it helps him not be directly on his back and he loves it. I have him sleep in it.Does anybody have any experience with this? Or know if zantac works good? Any advice to help him? Thank you 🙏