J.B.
My son was exactly like this! He had severe GERD. Not all babies with reflux spit up, there is also what's called "silent reflux". This is what my ds had and it took a few trial medications and different dosages/dosing times but it was a miracle when we got it right! I had hardly ever seen his eyes open or a smile let alone awake time that wasn't either comfort nursing or screaming. I would talk to your doctor about trying some medication. Prevacid 15mg solutabs worked well for us.
I certainly don't wish reflux on any one but wish I had known about it at first to avoid the depression that comes with an unhappy baby in pain. Feel free to contact me if you would like. I wish you the best of luck!
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I wanted to add that it very well could be something in your diet as well like many have suggested. Just be prepared if you plan to eliminate completely. I did this as well and found numerous issues. Search the term "The Elimination Diet" on the internet. You can find some great tips on how to do it properly as dairy is in things we don't consider "milk" and can take nearly 2 weeks to be completely out of your system.