Welcome @rastratman. We've got several members in the Heart Health group that know what it is like to live with high blood pressure and managing stress. Paging @teatime @predictable @contender1 @joem @beck @iluvkatz @murryone @vdouglas - do you have any thoughts to offer?

@rastratman, you may also be interested in reading these discussion threads where you'll meet others too.
https://connect.mayoclinic.org/discussion/hi-there-i-just-now-joined-your-group-and-after-reading-a/
https://connect.mayoclinic.org/discussion/after-a-quadruple-bypass/
https://connect.mayoclinic.org/discussion/hi-everyone-i-am-glad-to-be-a-part-of-this-community/

@rastratman, my first and enduring advice is to get a thorough examination by a nephrologist. A good one will use an endocrinologist to check crucial hormones and a cardiologist to check whether your heart is misbehaving. Lisinopril 20mg daily is only half the maximum for this kidney-favoring medication. There are half-dozen other classes of medications that might help; your nephrologist will probably recommend one of them. Finally, get a copy of the hypertension book issued by Mayo Clinic, "5 Steps to Controlling High Blood Pressure." It does a good job of covering all of the major factors involved, except for a few genetic mutations of the kidney (one of which I have). My nephrologist discovered my mutation; she is my hero.