Hi bettieblue
My DS had a diganosis of colic/ reflux at this age too and we tried cranial osteo treatments for it.
The Osteopath lay him on her table and gently felt around his head, back and hips. She was extremely gentle and it looked like she was cupping his head in her hands and very gently massaging him.
The Osteopath didn't actually think he had colic at all and suggested that, because he was head down in my pelvis for so long when I was pregnant he had some tightness around his head and neck, the kind of compression and discomfort you get when you do a headstand for too long.
Now I look back and am coming out of the hormonal brain fog of having a new baby, he didn't fit the symptoms of colic and no medication helped at all, plus the Dr was a bit slack in assessing him. This of course, may not be your expriences.
While it was not a cure for whatever discomfort he was in, it definately helped give him some peace for a few hours so he could have a nap. And that was as important to my well being as much as his.
I would also recommend baby massage for stressed babies who don't seem to be able to get comfortable especially when tired.
Hope this helps.