Do a checkup to see if you are doing as bad as you think and have your blood checked. Not more you can do besides getting a standing desk and realise you are a good while into your one life. You can take aspirin if your stomach can take it: half a day seems to benefit everyone with or without dispositions. Better in my very humble, previously hypochondriac and stressed person, opinion to live a nice life not thinkig about this crap and money and carreer too much but focus on family and friends and hobbies.