You need to rehydrate yourself with ORS by taking sips and have a liquid diet of soups and juices as you won't be able to digest solid food. If the problem persist visit the ER/casualty so that you can be given a few injections to control the symptoms and based on your level of dehydration you may require an IV drip.
Next Steps
Follow the steps as advised
Health Tips
If condition persists or worsens visit the ER at the earliest