Since two days ago, it feels like my heart beat has been more calm than usual. that day, i also experienced shortness of breath that lasted maybe an hour. not only that, but ive also been experiencing a bit of erectile dysfunction is anything wrong?

It is not feasible to provide a meaningful opinion without taking additional history, physical examination and may be some tests. It would be prudent to see your doctor and discuss if you may be depressed. Counter-intuitive as it may seem, exercise may help. Start with low intensity exercise such as walking and gradually increase the intensity as tolerated. Drink more water. Wish you good health!