Sleep regression part 2? Reflux?

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She started her regression two weeks before 4 months then after two weeks she went back to her schedule. She’s 5 months next week and it’s happening again. Following sleepy cues and check diaper and she’s fed. But she screams the moment we put her in the crib and we can’t clam her down!! So can this be regression again? I’m still not convinced that she doesn’t have a reflux 😅 can’t wait for her to talk because this guessing game with what’s going on is HARD!

I also want to add that she screams when we burp her during feeds. Arches her back a lot. And seems to get the most upset when her head hits the bed. She spits up a lot too. We pace feed and have the slowest nipple for her bottles. That’s why I’m still thinking she has reflux. She’s formula fed. Any suggestions the dr. Keeps giving us the same old “this is normal” and it’s driving me nuts because she isn’t happy and it breaks my heart.