When did it get better?

My four month old hates the car seat. She screams from the moment she is put in it

I just got her a new Chico next fit convertible thinking that would help - she was in the Britax infant seat before. But it actually seems to be worse....

She also has silent reflux and an airway disorder so I know positioning is a big issue that could be making her uncomfortable.

Any tricks that worked for you? Any specific car seat that might be a better fit ?