My 3 month old son has started to nurse for only a few minutes on one breast and then once off he starts sucking his hands and fingers and thumb. If I try and re-introduce my breast, he gets very upset. He eventually does go back on the breast again but repeats the pattern. He does this all througout the day. He has done this off and on for the past week or so. I have burped him for upwards of 20 minutes and then tried to nurse again and he is still upset. He doesnt appear to be losing weight and I have checked for signs of thrush in his mouth. He doesnt seem to have any thrush. I have heard about non-nutritive sucking but I wonder if he is getting enough when he only nurses for a couple of minutes. I am very frustrated and dont know what is going on with him. I plan on calling the doctor soon but wanted to know if anyone had any words of wisdom?