Hey JJ,It is good to see you here and I am going to post the link from our resources here so you can read the basics on GERD.
https://www.healingwell.com/community/default.aspx?f=45&m=1483795
Please consider seeing a GI specialist as being in pain and taking care of a newborn must be very stressful for you. My thoughts are with you.
Kindly,
Kitt