Very negative dreams during sleep. Ok.

Negative dreams during sleep for several years. Sometimes even torturous. Disturbed sleep. I feel relieved when my sleep is broken in the night but then another cycle of dreams take over. These revolve around 5 or 6 subjects mostly. I generally go to bed at 11 pm after watching TV News. I get up at around 6 am, tired and exhausted due to bad dreams. I am 71 years old, retired, executive director from a reputed PSU. I had an illuminating career but the dreams are negative with office environment surrounding me which is reverse of actual experience I haven been a person with high anxiety and perfection. MY MEDICAL HISTORY: I am diabetic for the last 20 years. I am on medicines as well as Insulin (twice a day) as per my doctor's advice. I am able to monitor sugar levels quite well. 5 months back I had gone thru heart procedure and 3 stents were implanted in 2 of my arteries. 3rd Artery has also 90% blockage. My HB level has been 10.5 for years. No change. All tests done and ok.