djj (2/4/2016)
Be honest and say you need to slow down and due to medical reasons you cannot handle the stress the previous positions held.
Jeff Moden (2/4/2016)
First of all, hat's off to you for trying. Never cut yourself down because of such a thing.
I couldn't agree more with both of these comments. Kudos for wanting to work and for trying.
You know what your medical limitations are and, hopefully, what you're able to do and not do. It sounds like you're already being honest with yourself, so continue that honesty and be honest with the recruiters and prospective employers. You probably already know there will be salary implications with a "step down" in responsibility.
There's no advice I can offer than you don't already know, so I'll offer a word of encouragement. Good job. Don't ever give up.