Hello and welcome to SR x. This is a great place to come for help and support, am pleased you found us.
You are doing the right thing by reaching out for help, and your doctor will be able to help with the withdrawals. I would follow the medical advice you've been given and read up on the various methods of how to quit on here. The class of April on this forum have plenty of people at the same stage as you, you will hopefully make a friend or 2 too.