If you are on BP meds, you need to STOP the plan and go to your doctor TOMORROW. I know you're depressed. The weight is temporary. You CAN lose it - but you have MEDICAL issues that need immediate attention.
You're getting 'extremely hungry and sick, weak, nauseated and your heart jolts back with a start.' These are NOT normal things to feel on a diet. These are serious events. Go to the doctor.
Eat a normal meal of lean protein, veggies and if you need it, a starch until you can get to the doc.