Thanks for writing your query.
It will be helpful if you please mention your blood pressure status. Whether you are hypertensive or on any medicines?
After reading your post, it seems that you are having Gastritis
which has resulted in vomiting
You can take antacids like Omeprazole
20 mg along with Domperidone
10 mg for relief of your symptoms. When you are feeling much better to accept oral intake, then take Oral Rehydration fluids if you are feeling dehydrated.
occurs if the intestines are also inolved.
If the problem persists, you should get yourself examined in the Emergency Department and get your vitals recrorded.
I hope this is helpful to you.