If you're determined to taper, could you maybe go see your doctor and take their advice to do it safely. They can then check you over and make sure you're not endangering yourself. They may also be able to advise on supervised tapers /detox /rehab facilities available, and (on a slightly more negative note) where to go and what to say if you get taken ill suddenly through it.
There are people on here who have tapered but they're in the minority. Hopefully they'll be along soon to share their experiences with you.
Have you tried doing a thread search for tapering? Could be worth a go. Just click on the little magnifying glass top right of this page and type in your search. (Sorry if you already know that - I presume nothing on here as we all come with different experience and confidence regarding th inter-web).
BB