I’m 25 yr old, had heart attack, heart rate at rest 85-90, chest pain, is it caused by energy drinks?

I had a heart attack almost a year ago, I am 25yts old, female, 125lbs, and I’m 5’7. Lately I can not get my heart rate down. I have a Fitbit watch and my resting heart rate is between 85-90. Is this something I should be concerned about? I have been experiencing chest pain, but I find the issue is caused by drinking energy drinks.

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