Breastfeeding issues

So my August baby and I had a great breastfeeding relationship. But with my son, born in October, it is totally different. It was going well until this last week. He will scream and turn anytime I try to nurse him. It is heartbreaking cause this cry and scream is like ‘please no dont feed me’. Like I’m torturing him! I haven’t changed my diet in any way. His poops are fine. I’m at a loss. I know I should probably contact a lactation consultant but I am so busy 😥. I do eventually get him to nurse but I have to coax him. Sometimes trick him by having a pacifier in his mouth and then quickly slipping the nipple in. Then he will eat like he’s starving. I know he is getting enough milk also cause he is like 90th percentile for height and weight. I just don’t know what is causing the frantic screaming and turning away.