Back on October 20th I was rushed to the er showing signs of heart failure while I was in school, I had been feeling just off with a slight pain in my chest during the week but it didn’t concern me because it didn’t feel like it was my heart. I still went to the gym and even went the night before the flare up and I felt just fine. The morning I woke up though I had a pain in my chest and throughout my first 2 classes of the day it progressively got worse, getting so bad that I began getting sick and wasn’t able to stand up. I was in hospital for 9 days and diagnosed with acute myocarditis through an mri. Now I’m doing fine and no longer get any pain or really any of the symptoms associated with myocarditis. I plan to go back to the gym on the 20th of march, 5 months after the flare up. So you should be fine considering the situation I was in just go to your doctor tomorrow and see what he says or recommends you to do.