Dear Ang, hello.
and stress affects your body in different ways, one of them is affect on your digestive system like gastritis
, etc. Continuous stress result in increased acid secretion in stomach. This can result in nausea
You should take antacids and antiemetics under medical supervision. This should cure your stomach pain and vomiting episodes. But you should avoid stress.
Also get yourself investigated for Liver Function Test (LFT).
I hope this is helpful for you.
Thanks and lead a stress free life.