I don't think you're in any danger of going to hell. Jesus nurtured and healed the sick, they were special people to him. And Luke was a physician. In Jesus' day there were no medicines, and people did the best they could. When people like us were sick they said they had "demons". We know better now. Now we have medicines, and I think Jesus wants us to put our faith in our doctors to look after our bodies and in Jesus to save our souls. BP is a physical illness, because the neurotransmitters in the brain are scrambled. It messes up what you think but that's a physical manifestation of the illness, not anything to do with our souls.
God helps the helpless! Isaiah 25:4 declares, "For You have been a defense for the helpless, a defense for the needy in his distress, a refuge from the storm, a shade from the heat..." Romans 5:6 tells us, "For while we were still helpless, at the right time Christ died for the ungodly."
And the Beatitudes: Matthew 5:3-12 "Blessed are the poor in spirit..."
My aunt was extremely religious, and I believe that she was Bipolar. She had no treatment, because she lived alone, and the family just thought she was different, not sick. She also lived 2000 miles away from us. I know that she's in heaven now, and I hope when I get there I have a chance to talk to her about her life.