My son had a set back jaw which in turn prompted massive feeding problems and awful colic for a very long time!
This is just a tip in case you haven't tried it, for making baby more comfortable.
Bend you arm across your body (90 degree type thing)If you put baby on their front along your forearm, head nearest your elbow facing outwards, and put your hand between their legs.
Josh's legs and arms just flopped and it really seemed to keep him a bit happier while the colic passed.
Hope this helps, I know everyone has their own way of doing things!
