Any cool-coloured stone will bring down the fever; and avoid hot-coloured stones. Place stones directly on the body - head, chest, stomach. If you are shivering and they fall off, tape them. Cleanse them in pure clear cool water regularly - every hour or so - with the intent of filling the stone with the purity and coolness of the water. Blue lace agate works particularly well.
For chest pains, mallow flowers and thyme (infused) or mallow root (decoction) work wonders. The root is stronger. Thyme on its own is powerful too and you can drink it by the pint, especially with real honey - make sure the honey is pure and directly from the beekeeper. Commercial honey is just sugar.