This is what I'm seeing with my 5 week old (EBF):

-frequent spit up. Not sure if it is technically "projectile" but it has hit the floor and back of my legs when she's over my shoulder., covered couch cushions behind us, etc.
-spit up is curdled and smells acidic/like vomit.
-spitting up an hour or more after feeding.
-pain(maybe gas pain, maybe not?) after feedings/spitting up at night and in the morning. Squirming, pulling her legs up, crying.
-gas (lots of burps), sometimes spitting up after/with burp.
-frequent "wet" hiccups that seem to bother her a lot.

Does this seem like normal spit up behavior? Sometimes I think, "oh she is just a happy spitter" but after the more projectile-like episodes she is not happy.

We have tried keeping her upright after feedings and it hasn't seemed to have made much of a difference. She comfortably goes to sleep on her back at night and for naps (after she's burped and spit up and I've calmed her down) and she doesn't spit up in her sleep.

Could this be reflux? Should I cut out dairy? Advice please!