Welcome, bcHE. How ya doin? I know it's probably hard to think clearly right now. Keep yourself hydrated, gatorade, gingerale, whatever you can keep down. The mathadone is stored in the liver, so you probably felt ok for 3 or 4 days because the reserves were being released into your system. Not many people can wd alone, without some sort of clinical/medical assistance. You haven't failed, and God has not failed you. That's why He provided you with this resource, and with hospital ER's, clinics, and meetings.
Are you close to a rehab facility that has a detox unit? There's a handful of good ones in Florida. Feel free to PM me if you'd like. Sending prayers your way.