Don't force him! My friend also same case with you. She never force his son, after her son go to the kindergarten, he can learn from other children.
On the other point, he don't want to see doctor and eat the medicine. My children also like this, after he go to kindergarten, you can ask the teacher to tell him he must eat the medicine if he is sick. It very work because my children think that if she eat the medicine by herself that mean she is very brave. Give her more appreciation and keep on trying. Remember don't show him you are angry and impatient.