Your body is your temple. It requires maintenance. Teeth and heart your 2 main ones. I was lackadaisical when it came to my teeth. Get your teeth looked at 2 times a year. Internal med doctor once a year. One guy was feeling tired and would take a nap before a ball game. He attributed it to getting older. His tests prior showed no big problems. But he was felled by a heart attack. I think he was late 40s. He didn't know it at the time but both grand fathers suffered the same fate. Good to know your family history. When your doing something different in your normal routine, it's best to get it checked out thoroughly. For a suspected heart ailment a catherization is the best way. With this they can see any blockages. What you can do at home is monitor your blood pressure. See a doctor if over 140 over 80. Ideally it's 120 /80. Still even with good blood pressure numbers, you still have to look at other possible things that are different than what has gone on in the past.
Everything has to be maintained and it takes time and work. Your body, your house, your car and family. One thing that doesn't require work is contemplation. In this endeavor, many good things can come from it. 10 minutes every day. Even a couple minutes is better than no minutes. By keeping a journal, you will be able to see the changes. Write down the things that upset you. This is what you have to work on. By doing this you are making yourself stronger and better. You will be more comfortable in your own skin. No strenuous work, just a little bit of time. Try doing it in the morning to set the day off in a positive direction. You can say to yourself this day is going to be even better than yesterday.