For the last 2-3 days, I am feeling pain while sleeping left side and a feeling that my heart is beating loudly. I have been doing weight training and cardio excercises for last 3 months 5-6 times a week with one scoop of whey protein concentrate. Can excercise or protein lead to heart problems, shall I discontinue ? I am 26 yo, weight 62kg, height 5'8", vegetarian, non-smoker, non-drinker. I had mild covid in March 2021.