Reflux

So my daughter was born 10/13/17. She was a major cluster feeder but would lay down for a while to sleep no problem As a newborn...

Now my son, was born a few days ago and he has been spitting up more after he eats.

I would not go as far to say it’s ‘vomit’ but just excessive spit up....he hates laying on his back because of this and him being in the Rock N Play/Swing Bouncer (aka inclined) doesn’t seem to be helping.

What gives? What else can I do?