Our grandparents knew how to heal whatever was going on with us. Castor oil (accupuncturists use it as a hot pad), garlic (used in place of antibiotics for pregnant women), etc. I want to suggest another of nature's wonders - ginger.
Ginger is great for motion sickness, nausea, it's an anti-inflammatory as well. Ginger tea is a cure-all in Ayurvedic medicine. The practitioners suggest drinking at least one cup of ginger tea each day. You can buy decaf as well.
I found a great ginger treat, Crystallized Ginger. Mine came from Sprout's, although there are lots of sites on the net. It's a small cube of ginger, with sugar on it, but a miniscule amount of sugar compared to a Coke or even juice. I always take it on the golf course with me as a pick me up and sweet treat.
There are also recipes on the internet that substitute Stevia, the best natural sweetener in my estimation, for sugar. You can buy clumps of ginger, even from the .99c store, slice it thinly to cook or put in tea. If you have a sensitive stomach, it could feel a bit burny.
In any event, try ginger in whatever form you desire. You'll like it and it will do wonders for your