@Gingergrrl I'm sorry to reply sooo late. The herb in question is skullcap. I think you are right to consult a naturopath or similar, they may be able to advise on the correct dose. I know that the efficacy of the herbal medicine I get from my medical herbalist is far better than anything I can buy off the shelf. And yes, self-massage with a tennis ball is a thing! There are loads of videos on line. You can put it in a sock, so it can't roll away, then place the ball between yourself and a wall, and roll it into all the knotty areas. This only works if your arms are relatively OK, I would have struggled with this at my worst. Good luck and I hope your pain is more manageable soon.