The symptoms you describe most certainly are more severe than IBS.
While your EKG was normal, I would go for a CT angiogram of your heart just for peace of mind.
Many of my colleagues had normal EKGs but abnormal CT angios.
Heard of unstable angina? That sounds like what you had.
You should check your heart especially if you have:
family history of heart disease
high cholesterol
hypertension
diabetes
smoker
Hi. Sorry for the late reply, just seen your message. I am not in Seoul, I am located 500km south. I have only been once in Seoul, for one night, so I am not really an expert. My colleagues here at the office tell me it'll be very busy. Traffic is described as 'terrible'. On main day of Lunar new year (the middle of the three days) everything is shut down in Seoul, in other two days almost everything should be open. If you want more info, let me know, I have many colleagues here I can ask.
Hi From Singapore.
Hope to tap your local knowledge.
I am thinking of spending Chinese New Year (Jan 25 to 28 )in Seoul.
Is it an OK time to visit?
ie does everything shut down like in Hong Kong/China?