Hello. Welcome to Ask The Doctor.
Yes you should see your doctor as you might have developed the side effects from the injection.
You have not mentioned that for what primary reason you received the injection. So a possibility is also that you might be having nausea, vomiting and loose stools due to the primary condition only.
See your doctor.
I hope it helps.
These Q&A’s are for educational purposes and should not be relied upon as a substitute for medical advice you may receive from your physician. If you have a medical emergency, please call 911. These answers do not constitute or initiate a patient/doctor relationship.