That sounds like my two who had reflux. One wasn't medicated and was difficult like that for a long time. With the second I jumped on it and asked for losec right away and when it kicked in (can take a little while) it made a world of difference and I finally had a happy baby. If you haven't already I'd ask for a referral to a paediatrician. They can properly diagnose if it's reflux and then medicate/try prescription formula as necessary. Hang in there it's such a tough time, but it does get better one way or another. Hugs.