I'm a supporter of baby chiro as well. Their little bodies go through a lot of contorting to get born so a bit of chiro can be really helpful.

Also, maybe you can take you car to a place that installs baby car seats and ask them if it is safe to have the seat raised a little at the head end to see if that helps with colic. I was surprised how different cars can make the seat sit at different angles and both times we've had car seats installed professionally we've been asked to bring towels along so that they could put them underneath to position the seats correctly. You might find that her seat can be safely tilted more so that her colic may improve.