First — you didn’t tell us why your doc ordered a stress test. Probably you had a symptom or your provider had a concern. This is significant in itself.
Second—you failed the stress test. It identified hypertension. You now have a medical problem which calls for a medical intervention. Work with a medical professional to address this.
Third—do the recommended medical intervention. This might include a pill so that you can safely exercise. It may be you have sleep apnea and need a CPAP (this is common for folks who are overweight with hypertension). Weight loss, diet, exercise, stress reduction, and breathing will all be part of this. Once you have your lifestyle/sleep/weight dialed in you may no longer need a pill or whatever. Again, work with a provider (if you’re not a fan of allopathic medicine consider a naturopath). Also, if the medical recommendation doesn’t work for you — tell your provider.
Fourth — start a simple regimen. Walking is probably a good start. If you are walking consider adding weight as you lose weight (ie put 10# in a backpack once you’ve lost 10#). I have found “punch the clock” workouts with few moving parts and little thought to be key for me as I work shifts as well and have bad sleep. For you something the easy strength for fat loss (
@Dan John), simple and sinister, or iron cardio
@Brett Jones might work well. Don’t start these working out until you have an OK from your medical provider - Remember all those disclaimers at the front of the book? Those are for you.
Finally — good luck! I mean that sincerely. You have had a wake up call and you have a community here to support you.