It’s quite common, it’s called DMER, dysphoric milk ejection reflex.
Have a look at something called D-MER it’s an actual temporary condition related to the let down and hormones. I had it with both of mine and it was so intense and the feeling was literally doom and self loathing with shape like cramps. Mine did go around 3 months mark and gradually got less over time 😊
Take a look into D-MER, it could be something like that x