I am a huge fan of osteopathy. Had ds seen at 6 weeks because he was very unsettled, couldnt be put down, made strange grunting noises in sleep, almost like he was in pain. It did the trick. Also had dd seen for fluid in ears, and I have had it for migraine. All very successful.
It is remarkable to see, and they hardly move the child at all. i didnt take dd as baby (despite loads of advice to) aas thought they would bend her about, but its not like that, really small gentle movements. Very relaxing. Its worth a go, and if you can get a good one, they should tell you whether they think they can help or not.