I generally use the 30c potency. Since this a long standing problem, I would suggest starting with the arnica, 4 or 5 pellets 3X/day for the first few days. Then switch to the hypericum, 3x/day. You may need to keep this up for few weeks.

If at anytime you start having any improvement, you can back off. If it improves but levels off, you may want to try a 200c dose.

The key in homeopathy is finding the exact remedy and these may not be the ones you need. But they are strongly indicated and may work.