For the last several weeks, Ellie has been vomiting while eating solids. It doesn't seem to matter what it is (even happens from drinking sips of water from a sippy cup). I usually nurse her right before she eats (unless she refuses to nurse) and she almost always throws up. If she doesn't nurse before, she usually keeps her food down. Why is she doing this? She had pretty bad reflux, but it's been much better for the last couple of months. Could it be reflux related?