Eat Girl Eat? I feel like that when my body needs a boost of energy.
MayB make a note of everything you eat and when for 5 days. See if there is a pattern ........... lack of sustenance can cause anxiety surges. Headaches can be caused by dehydration. It becomes a vicious circle: body needs energy so it gets queasy then we don't eat. Little and often. Snack: my go-2 are bananas, porridge, slow release foods, dried fruits and nuts, pancakes ........ ginger biscuits, Jacobs cream crackers: anything that 'stays' the stomach to stop that nausea.
A metallic taste is often a side-effect of chemotherapy. It can also mean that the body lacks minerals/vitamins. Are u due to see a dentist, is there a problem in your gums?