Why haven't you called Reptile Rhapsody? Clearly, this little turtle isn't doing well. He needs help. He needs it right away, from the sounds of it. You an try looking for family members to take it, but if they have no idea how to care for box turtles it could be pretty tricky to nurse one back to help.
Please call Reptile Rhapsody. If it helps, I will give you a phone card number to use. If they can't help you, they can at least get you in touch with the best people to save this life.