Best thing you can do, in my opinion, is take a week off from using your hands and wrists. A week with no mouse dragging, or typing. Let your hands and wrists relax and recover. If you can take a two week holiday – so much the better. Although you’ll probably suffer from Internet withdrawal 😉
That said, once I started using them, I felt better fairly quickly. But that was because I was taking more breaks, not using them so much, and sorting out my posture.
Please have a chat with your doctor to see if there’s anything else they can recommend.