Fluids.
Warm cup of a tsp of apple cider vinegar and honey… Or ginger lemon and honey in hot water (anti-inflammatory, also good for digestion). nasal spray.. no doubt congested.
Aloe vera concentrate for the digestive system.
A heating pad or some sort of hot pack either infused with hers or rice or whatever. Also for nausea are the sea bands. They have prego pops that use specific essential oils that help the queasiness in stomach. But they have a high sugar content. Or you could stick with Pepto-Bismol made out of a bismuth and very effective.
For the congestion you might try lavender lemon and eucalyptus oil in water,,(essential oils, digestible) swish in mouth for 30 seconds and then swallow. Helps your mouth feel very clean as well.