The Emergency Medical Information Center (dial 119 within Korea) has English speaking doctors available 24 hours a day to assist foreigners and provide them with relevant medical information in emergencies.
Here is a list of Korean doctors and dentists who speak acceptable English, who may be able to help you: https://kr.usembassy.gov/u-s-citizen-services/local-resources-of-u-s-citizens/doctors/
Also, do you have health insurance? Korean hospitals generally do not accept foreign medical insurance and expect advance payment for services in the form of cash or credit cards from foreigners. If you’re relying on an insurance policy from the U.S., be sure to check with your company to determine if you have coverage overseas.